diff --git a/cmd/arc_summary/Makefile.am b/cmd/arc_summary/Makefile.am
index 1a26c2c199..f419f07e0e 100644
--- a/cmd/arc_summary/Makefile.am
+++ b/cmd/arc_summary/Makefile.am
@@ -1,13 +1,8 @@
 bin_SCRIPTS = arc_summary
 
 CLEANFILES = arc_summary
-EXTRA_DIST = arc_summary2 arc_summary3
-
-if USING_PYTHON_2
-SCRIPT = arc_summary2
-else
+EXTRA_DIST = arc_summary3
 SCRIPT = arc_summary3
-endif
 
 arc_summary: $(SCRIPT)
 	cp $< $@
diff --git a/cmd/arc_summary/arc_summary2 b/cmd/arc_summary/arc_summary2
deleted file mode 100755
index 3302a802d1..0000000000
--- a/cmd/arc_summary/arc_summary2
+++ /dev/null
@@ -1,1180 +0,0 @@
-#!/usr/bin/env python2
-#
-# $Id: arc_summary.pl,v 388:e27800740aa2 2011-07-08 02:53:29Z jhell $
-#
-# Copyright (c) 2008 Ben Rockwood <benr@cuddletech.com>,
-# Copyright (c) 2010 Martin Matuska <mm@FreeBSD.org>,
-# Copyright (c) 2010-2011 Jason J. Hellenthal <jhell@DataIX.net>,
-# All rights reserved.
-#
-# Redistribution and use in source and binary forms, with or without
-# modification, are permitted provided that the following conditions
-# are met:
-#
-# 1. Redistributions of source code must retain the above copyright
-#    notice, this list of conditions and the following disclaimer.
-# 2. Redistributions in binary form must reproduce the above copyright
-#    notice, this list of conditions and the following disclaimer in the
-#    documentation and/or other materials provided with the distribution.
-#
-# THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS ``AS IS'' AND
-# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
-# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
-# ARE DISCLAIMED.  IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE
-# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
-# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
-# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
-# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
-# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
-# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
-# SUCH DAMAGE.
-#
-# If you are having troubles when using this script from cron(8) please try
-# adjusting your PATH before reporting problems.
-#
-# Note some of this code uses older code (eg getopt instead of argparse,
-# subprocess.Popen() instead of subprocess.run()) because we need to support
-# some very old versions of Python.
-#
-
-"""Print statistics on the ZFS Adjustable Replacement Cache (ARC)
-
-Provides basic information on the ARC, its efficiency, the L2ARC (if present),
-the Data Management Unit (DMU), Virtual Devices (VDEVs), and tunables. See the
-in-source documentation and code at
-https://github.com/openzfs/zfs/blob/master/module/zfs/arc.c for details.
-"""
-
-import getopt
-import os
-import sys
-import time
-import errno
-
-from subprocess import Popen, PIPE
-from decimal import Decimal as D
-
-
-if sys.platform.startswith('freebsd'):
-    # Requires py27-sysctl on FreeBSD
-    import sysctl
-
-    def is_value(ctl):
-        return ctl.type != sysctl.CTLTYPE_NODE
-
-    def load_kstats(namespace):
-        """Collect information on a specific subsystem of the ARC"""
-
-        base = 'kstat.zfs.misc.%s.' % namespace
-        fmt = lambda kstat: (kstat.name, D(kstat.value))
-        kstats = sysctl.filter(base)
-        return [fmt(kstat) for kstat in kstats if is_value(kstat)]
-
-    def load_tunables():
-        ctls = sysctl.filter('vfs.zfs')
-        return dict((ctl.name, ctl.value) for ctl in ctls if is_value(ctl))
-
-elif sys.platform.startswith('linux'):
-
-    def load_kstats(namespace):
-        """Collect information on a specific subsystem of the ARC"""
-
-        kstat = 'kstat.zfs.misc.%s.%%s' % namespace
-        path = '/proc/spl/kstat/zfs/%s' % namespace
-        with open(path) as f:
-            entries = [line.strip().split() for line in f][2:] # Skip header
-        return [(kstat % name, D(value)) for name, _, value in entries]
-
-    def load_tunables():
-        basepath = '/sys/module/zfs/parameters'
-        tunables = {}
-        for name in os.listdir(basepath):
-            if not name:
-                continue
-            path = '%s/%s' % (basepath, name)
-            with open(path) as f:
-                value = f.read()
-            tunables[name] = value.strip()
-        return tunables
-
-
-show_tunable_descriptions = False
-alternate_tunable_layout = False
-
-
-def get_Kstat():
-    """Collect information on the ZFS subsystem from the /proc virtual
-    file system. The name "kstat" is a holdover from the Solaris utility
-    of the same name.
-    """
-
-    Kstat = {}
-    Kstat.update(load_kstats('arcstats'))
-    Kstat.update(load_kstats('zfetchstats'))
-    Kstat.update(load_kstats('vdev_cache_stats'))
-    return Kstat
-
-
-def fBytes(b=0):
-    """Return human-readable representation of a byte value in
-    powers of 2 (eg "KiB" for "kibibytes", etc) to two decimal
-    points. Values smaller than one KiB are returned without
-    decimal points.
-    """
-
-    prefixes = [
-        [2**80, "YiB"],   # yobibytes (yotta)
-        [2**70, "ZiB"],   # zebibytes (zetta)
-        [2**60, "EiB"],   # exbibytes (exa)
-        [2**50, "PiB"],   # pebibytes (peta)
-        [2**40, "TiB"],   # tebibytes (tera)
-        [2**30, "GiB"],   # gibibytes (giga)
-        [2**20, "MiB"],   # mebibytes (mega)
-        [2**10, "KiB"]]   # kibibytes (kilo)
-
-    if b >= 2**10:
-
-        for limit, unit in prefixes:
-
-            if b >= limit:
-                value = b / limit
-                break
-
-        result = "%0.2f\t%s" % (value, unit)
-
-    else:
-
-        result = "%d\tBytes" % b
-
-    return result
-
-
-def fHits(hits=0):
-    """Create a human-readable representation of the number of hits.
-    The single-letter symbols used are SI to avoid the confusion caused
-    by the different "short scale" and "long scale" representations in
-    English, which use the same words for different values. See
-    https://en.wikipedia.org/wiki/Names_of_large_numbers and
-    https://physics.nist.gov/cuu/Units/prefixes.html
-    """
-
-    numbers = [
-            [10**24, 'Y'],  # yotta (septillion)
-            [10**21, 'Z'],  # zetta (sextillion)
-            [10**18, 'E'],  # exa   (quintrillion)
-            [10**15, 'P'],  # peta  (quadrillion)
-            [10**12, 'T'],  # tera  (trillion)
-            [10**9, 'G'],   # giga  (billion)
-            [10**6, 'M'],   # mega  (million)
-            [10**3, 'k']]   # kilo  (thousand)
-
-    if hits >= 1000:
-
-        for limit, symbol in numbers:
-
-            if hits >= limit:
-                value = hits/limit
-                break
-
-        result = "%0.2f%s" % (value, symbol)
-
-    else:
-
-        result = "%d" % hits
-
-    return result
-
-
-def fPerc(lVal=0, rVal=0, Decimal=2):
-    """Calculate percentage value and return in human-readable format"""
-
-    if rVal > 0:
-        return str("%0." + str(Decimal) + "f") % (100 * (lVal / rVal)) + "%"
-    else:
-        return str("%0." + str(Decimal) + "f") % 100 + "%"
-
-
-def get_arc_summary(Kstat):
-    """Collect general data on the ARC"""
-
-    output = {}
-    memory_throttle_count = Kstat[
-        "kstat.zfs.misc.arcstats.memory_throttle_count"
-        ]
-
-    if memory_throttle_count > 0:
-        output['health'] = 'THROTTLED'
-    else:
-        output['health'] = 'HEALTHY'
-
-    output['memory_throttle_count'] = fHits(memory_throttle_count)
-
-    # ARC Misc.
-    deleted = Kstat["kstat.zfs.misc.arcstats.deleted"]
-    mutex_miss = Kstat["kstat.zfs.misc.arcstats.mutex_miss"]
-    evict_skip = Kstat["kstat.zfs.misc.arcstats.evict_skip"]
-    evict_l2_cached = Kstat["kstat.zfs.misc.arcstats.evict_l2_cached"]
-    evict_l2_eligible = Kstat["kstat.zfs.misc.arcstats.evict_l2_eligible"]
-    evict_l2_eligible_mfu = Kstat["kstat.zfs.misc.arcstats.evict_l2_eligible_mfu"]
-    evict_l2_eligible_mru = Kstat["kstat.zfs.misc.arcstats.evict_l2_eligible_mru"]
-    evict_l2_ineligible = Kstat["kstat.zfs.misc.arcstats.evict_l2_ineligible"]
-    evict_l2_skip = Kstat["kstat.zfs.misc.arcstats.evict_l2_skip"]
-
-    # ARC Misc.
-    output["arc_misc"] = {}
-    output["arc_misc"]["deleted"] = fHits(deleted)
-    output["arc_misc"]["mutex_miss"] = fHits(mutex_miss)
-    output["arc_misc"]["evict_skips"] = fHits(evict_skip)
-    output["arc_misc"]["evict_l2_skip"] = fHits(evict_l2_skip)
-    output["arc_misc"]["evict_l2_cached"] = fBytes(evict_l2_cached)
-    output["arc_misc"]["evict_l2_eligible"] = fBytes(evict_l2_eligible)
-    output["arc_misc"]["evict_l2_eligible_mfu"] = {
-            'per': fPerc(evict_l2_eligible_mfu, evict_l2_eligible),
-            'num': fBytes(evict_l2_eligible_mfu),
-    }
-    output["arc_misc"]["evict_l2_eligible_mru"] = {
-            'per': fPerc(evict_l2_eligible_mru, evict_l2_eligible),
-            'num': fBytes(evict_l2_eligible_mru),
-    }
-    output["arc_misc"]["evict_l2_ineligible"] = fBytes(evict_l2_ineligible)
-
-    # ARC Sizing
-    arc_size = Kstat["kstat.zfs.misc.arcstats.size"]
-    mru_size = Kstat["kstat.zfs.misc.arcstats.mru_size"]
-    mfu_size = Kstat["kstat.zfs.misc.arcstats.mfu_size"]
-    meta_limit = Kstat["kstat.zfs.misc.arcstats.arc_meta_limit"]
-    meta_size = Kstat["kstat.zfs.misc.arcstats.arc_meta_used"]
-    dnode_limit = Kstat["kstat.zfs.misc.arcstats.arc_dnode_limit"]
-    dnode_size = Kstat["kstat.zfs.misc.arcstats.dnode_size"]
-    target_max_size = Kstat["kstat.zfs.misc.arcstats.c_max"]
-    target_min_size = Kstat["kstat.zfs.misc.arcstats.c_min"]
-    target_size = Kstat["kstat.zfs.misc.arcstats.c"]
-
-    target_size_ratio = (target_max_size / target_min_size)
-
-    # ARC Sizing
-    output['arc_sizing'] = {}
-    output['arc_sizing']['arc_size'] = {
-        'per': fPerc(arc_size, target_max_size),
-        'num': fBytes(arc_size),
-    }
-    output['arc_sizing']['target_max_size'] = {
-        'ratio': target_size_ratio,
-        'num': fBytes(target_max_size),
-    }
-    output['arc_sizing']['target_min_size'] = {
-        'per': fPerc(target_min_size, target_max_size),
-        'num': fBytes(target_min_size),
-    }
-    output['arc_sizing']['target_size'] = {
-        'per': fPerc(target_size, target_max_size),
-        'num': fBytes(target_size),
-    }
-    output['arc_sizing']['meta_limit'] = {
-        'per': fPerc(meta_limit, target_max_size),
-        'num': fBytes(meta_limit),
-    }
-    output['arc_sizing']['meta_size'] = {
-        'per': fPerc(meta_size, meta_limit),
-        'num': fBytes(meta_size),
-    }
-    output['arc_sizing']['dnode_limit'] = {
-        'per': fPerc(dnode_limit, meta_limit),
-        'num': fBytes(dnode_limit),
-    }
-    output['arc_sizing']['dnode_size'] = {
-        'per': fPerc(dnode_size, dnode_limit),
-        'num': fBytes(dnode_size),
-    }
-
-    # ARC Hash Breakdown
-    output['arc_hash_break'] = {}
-    output['arc_hash_break']['hash_chain_max'] = Kstat[
-        "kstat.zfs.misc.arcstats.hash_chain_max"
-        ]
-    output['arc_hash_break']['hash_chains'] = Kstat[
-        "kstat.zfs.misc.arcstats.hash_chains"
-        ]
-    output['arc_hash_break']['hash_collisions'] = Kstat[
-        "kstat.zfs.misc.arcstats.hash_collisions"
-        ]
-    output['arc_hash_break']['hash_elements'] = Kstat[
-        "kstat.zfs.misc.arcstats.hash_elements"
-        ]
-    output['arc_hash_break']['hash_elements_max'] = Kstat[
-        "kstat.zfs.misc.arcstats.hash_elements_max"
-        ]
-
-    output['arc_size_break'] = {}
-    output['arc_size_break']['recently_used_cache_size'] = {
-        'per': fPerc(mru_size, mru_size + mfu_size),
-        'num': fBytes(mru_size),
-    }
-    output['arc_size_break']['frequently_used_cache_size'] = {
-        'per': fPerc(mfu_size, mru_size + mfu_size),
-        'num': fBytes(mfu_size),
-    }
-
-    # ARC Hash Breakdown
-    hash_chain_max = Kstat["kstat.zfs.misc.arcstats.hash_chain_max"]
-    hash_chains = Kstat["kstat.zfs.misc.arcstats.hash_chains"]
-    hash_collisions = Kstat["kstat.zfs.misc.arcstats.hash_collisions"]
-    hash_elements = Kstat["kstat.zfs.misc.arcstats.hash_elements"]
-    hash_elements_max = Kstat["kstat.zfs.misc.arcstats.hash_elements_max"]
-
-    output['arc_hash_break'] = {}
-    output['arc_hash_break']['elements_max'] = fHits(hash_elements_max)
-    output['arc_hash_break']['elements_current'] = {
-        'per': fPerc(hash_elements, hash_elements_max),
-        'num': fHits(hash_elements),
-        }
-    output['arc_hash_break']['collisions'] = fHits(hash_collisions)
-    output['arc_hash_break']['chain_max'] = fHits(hash_chain_max)
-    output['arc_hash_break']['chains'] = fHits(hash_chains)
-
-    return output
-
-
-def _arc_summary(Kstat):
-    """Print information on the ARC"""
-
-    # ARC Sizing
-    arc = get_arc_summary(Kstat)
-
-    sys.stdout.write("ARC Summary: (%s)\n" % arc['health'])
-
-    sys.stdout.write("\tMemory Throttle Count:\t\t\t%s\n" %
-                     arc['memory_throttle_count'])
-    sys.stdout.write("\n")
-
-    # ARC Misc.
-    sys.stdout.write("ARC Misc:\n")
-    sys.stdout.write("\tDeleted:\t\t\t\t%s\n" % arc['arc_misc']['deleted'])
-    sys.stdout.write("\tMutex Misses:\t\t\t\t%s\n" %
-                     arc['arc_misc']['mutex_miss'])
-    sys.stdout.write("\tEviction Skips:\t\t\t\t%s\n" %
-                     arc['arc_misc']['evict_skips'])
-    sys.stdout.write("\tEviction Skips Due to L2 Writes:\t%s\n" %
-                     arc['arc_misc']['evict_l2_skip'])
-    sys.stdout.write("\tL2 Cached Evictions:\t\t\t%s\n" %
-                     arc['arc_misc']['evict_l2_cached'])
-    sys.stdout.write("\tL2 Eligible Evictions:\t\t\t%s\n" %
-                     arc['arc_misc']['evict_l2_eligible'])
-    sys.stdout.write("\tL2 Eligible MFU Evictions:\t%s\t%s\n" % (
-                     arc['arc_misc']['evict_l2_eligible_mfu']['per'],
-                     arc['arc_misc']['evict_l2_eligible_mfu']['num'],
-                     )
-    )
-    sys.stdout.write("\tL2 Eligible MRU Evictions:\t%s\t%s\n" % (
-                     arc['arc_misc']['evict_l2_eligible_mru']['per'],
-                     arc['arc_misc']['evict_l2_eligible_mru']['num'],
-                     )
-    )
-    sys.stdout.write("\tL2 Ineligible Evictions:\t\t%s\n" %
-                     arc['arc_misc']['evict_l2_ineligible'])
-    sys.stdout.write("\n")
-
-    # ARC Sizing
-    sys.stdout.write("ARC Size:\t\t\t\t%s\t%s\n" % (
-        arc['arc_sizing']['arc_size']['per'],
-        arc['arc_sizing']['arc_size']['num']
-        )
-    )
-    sys.stdout.write("\tTarget Size: (Adaptive)\t\t%s\t%s\n" % (
-        arc['arc_sizing']['target_size']['per'],
-        arc['arc_sizing']['target_size']['num'],
-        )
-    )
-
-    sys.stdout.write("\tMin Size (Hard Limit):\t\t%s\t%s\n" % (
-        arc['arc_sizing']['target_min_size']['per'],
-        arc['arc_sizing']['target_min_size']['num'],
-        )
-    )
-
-    sys.stdout.write("\tMax Size (High Water):\t\t%d:1\t%s\n" % (
-        arc['arc_sizing']['target_max_size']['ratio'],
-        arc['arc_sizing']['target_max_size']['num'],
-        )
-    )
-
-    sys.stdout.write("\nARC Size Breakdown:\n")
-    sys.stdout.write("\tRecently Used Cache Size:\t%s\t%s\n" % (
-        arc['arc_size_break']['recently_used_cache_size']['per'],
-        arc['arc_size_break']['recently_used_cache_size']['num'],
-        )
-    )
-    sys.stdout.write("\tFrequently Used Cache Size:\t%s\t%s\n" % (
-        arc['arc_size_break']['frequently_used_cache_size']['per'],
-        arc['arc_size_break']['frequently_used_cache_size']['num'],
-        )
-    )
-    sys.stdout.write("\tMetadata Size (Hard Limit):\t%s\t%s\n" % (
-        arc['arc_sizing']['meta_limit']['per'],
-        arc['arc_sizing']['meta_limit']['num'],
-        )
-    )
-    sys.stdout.write("\tMetadata Size:\t\t\t%s\t%s\n" % (
-        arc['arc_sizing']['meta_size']['per'],
-        arc['arc_sizing']['meta_size']['num'],
-        )
-    )
-    sys.stdout.write("\tDnode Size (Hard Limit):\t%s\t%s\n" % (
-        arc['arc_sizing']['dnode_limit']['per'],
-        arc['arc_sizing']['dnode_limit']['num'],
-        )
-    )
-    sys.stdout.write("\tDnode Size:\t\t\t%s\t%s\n" % (
-        arc['arc_sizing']['dnode_size']['per'],
-        arc['arc_sizing']['dnode_size']['num'],
-        )
-    )
-
-    sys.stdout.write("\n")
-
-    # ARC Hash Breakdown
-    sys.stdout.write("ARC Hash Breakdown:\n")
-    sys.stdout.write("\tElements Max:\t\t\t\t%s\n" %
-                     arc['arc_hash_break']['elements_max'])
-    sys.stdout.write("\tElements Current:\t\t%s\t%s\n" % (
-        arc['arc_hash_break']['elements_current']['per'],
-        arc['arc_hash_break']['elements_current']['num'],
-        )
-    )
-    sys.stdout.write("\tCollisions:\t\t\t\t%s\n" %
-                     arc['arc_hash_break']['collisions'])
-    sys.stdout.write("\tChain Max:\t\t\t\t%s\n" %
-                     arc['arc_hash_break']['chain_max'])
-    sys.stdout.write("\tChains:\t\t\t\t\t%s\n" %
-                     arc['arc_hash_break']['chains'])
-
-
-def get_arc_efficiency(Kstat):
-    """Collect information on the efficiency of the ARC"""
-
-    output = {}
-
-    arc_hits = Kstat["kstat.zfs.misc.arcstats.hits"]
-    arc_misses = Kstat["kstat.zfs.misc.arcstats.misses"]
-    demand_data_hits = Kstat["kstat.zfs.misc.arcstats.demand_data_hits"]
-    demand_data_misses = Kstat["kstat.zfs.misc.arcstats.demand_data_misses"]
-    demand_metadata_hits = Kstat[
-        "kstat.zfs.misc.arcstats.demand_metadata_hits"
-        ]
-    demand_metadata_misses = Kstat[
-        "kstat.zfs.misc.arcstats.demand_metadata_misses"
-        ]
-    mfu_ghost_hits = Kstat["kstat.zfs.misc.arcstats.mfu_ghost_hits"]
-    mfu_hits = Kstat["kstat.zfs.misc.arcstats.mfu_hits"]
-    mru_ghost_hits = Kstat["kstat.zfs.misc.arcstats.mru_ghost_hits"]
-    mru_hits = Kstat["kstat.zfs.misc.arcstats.mru_hits"]
-    prefetch_data_hits = Kstat["kstat.zfs.misc.arcstats.prefetch_data_hits"]
-    prefetch_data_misses = Kstat[
-        "kstat.zfs.misc.arcstats.prefetch_data_misses"
-        ]
-    prefetch_metadata_hits = Kstat[
-        "kstat.zfs.misc.arcstats.prefetch_metadata_hits"
-        ]
-    prefetch_metadata_misses = Kstat[
-        "kstat.zfs.misc.arcstats.prefetch_metadata_misses"
-        ]
-
-    anon_hits = arc_hits - (
-        mfu_hits + mru_hits + mfu_ghost_hits + mru_ghost_hits
-        )
-    arc_accesses_total = (arc_hits + arc_misses)
-    demand_data_total = (demand_data_hits + demand_data_misses)
-    prefetch_data_total = (prefetch_data_hits + prefetch_data_misses)
-    real_hits = (mfu_hits + mru_hits)
-
-    output["total_accesses"] = fHits(arc_accesses_total)
-    output["cache_hit_ratio"] = {
-        'per': fPerc(arc_hits, arc_accesses_total),
-        'num': fHits(arc_hits),
-    }
-    output["cache_miss_ratio"] = {
-        'per': fPerc(arc_misses, arc_accesses_total),
-        'num': fHits(arc_misses),
-    }
-    output["actual_hit_ratio"] = {
-        'per': fPerc(real_hits, arc_accesses_total),
-        'num': fHits(real_hits),
-    }
-    output["data_demand_efficiency"] = {
-        'per': fPerc(demand_data_hits, demand_data_total),
-        'num': fHits(demand_data_total),
-    }
-
-    if prefetch_data_total > 0:
-        output["data_prefetch_efficiency"] = {
-            'per': fPerc(prefetch_data_hits, prefetch_data_total),
-            'num': fHits(prefetch_data_total),
-        }
-
-    if anon_hits > 0:
-        output["cache_hits_by_cache_list"] = {}
-        output["cache_hits_by_cache_list"]["anonymously_used"] = {
-            'per': fPerc(anon_hits, arc_hits),
-            'num': fHits(anon_hits),
-        }
-
-    output["most_recently_used"] = {
-        'per': fPerc(mru_hits, arc_hits),
-        'num': fHits(mru_hits),
-    }
-    output["most_frequently_used"] = {
-        'per': fPerc(mfu_hits, arc_hits),
-        'num': fHits(mfu_hits),
-    }
-    output["most_recently_used_ghost"] = {
-        'per': fPerc(mru_ghost_hits, arc_hits),
-        'num': fHits(mru_ghost_hits),
-    }
-    output["most_frequently_used_ghost"] = {
-        'per': fPerc(mfu_ghost_hits, arc_hits),
-        'num': fHits(mfu_ghost_hits),
-    }
-
-    output["cache_hits_by_data_type"] = {}
-    output["cache_hits_by_data_type"]["demand_data"] = {
-        'per': fPerc(demand_data_hits, arc_hits),
-        'num': fHits(demand_data_hits),
-    }
-    output["cache_hits_by_data_type"]["prefetch_data"] = {
-        'per': fPerc(prefetch_data_hits, arc_hits),
-        'num': fHits(prefetch_data_hits),
-    }
-    output["cache_hits_by_data_type"]["demand_metadata"] = {
-        'per': fPerc(demand_metadata_hits, arc_hits),
-        'num': fHits(demand_metadata_hits),
-    }
-    output["cache_hits_by_data_type"]["prefetch_metadata"] = {
-        'per': fPerc(prefetch_metadata_hits, arc_hits),
-        'num': fHits(prefetch_metadata_hits),
-    }
-
-    output["cache_misses_by_data_type"] = {}
-    output["cache_misses_by_data_type"]["demand_data"] = {
-        'per': fPerc(demand_data_misses, arc_misses),
-        'num': fHits(demand_data_misses),
-    }
-    output["cache_misses_by_data_type"]["prefetch_data"] = {
-        'per': fPerc(prefetch_data_misses, arc_misses),
-        'num': fHits(prefetch_data_misses),
-    }
-    output["cache_misses_by_data_type"]["demand_metadata"] = {
-        'per': fPerc(demand_metadata_misses, arc_misses),
-        'num': fHits(demand_metadata_misses),
-    }
-    output["cache_misses_by_data_type"]["prefetch_metadata"] = {
-        'per': fPerc(prefetch_metadata_misses, arc_misses),
-        'num': fHits(prefetch_metadata_misses),
-    }
-
-    return output
-
-
-def _arc_efficiency(Kstat):
-    """Print information on the efficiency of the ARC"""
-
-    arc = get_arc_efficiency(Kstat)
-
-    sys.stdout.write("ARC Total accesses:\t\t\t\t\t%s\n" %
-                     arc['total_accesses'])
-    sys.stdout.write("\tCache Hit Ratio:\t\t%s\t%s\n" % (
-        arc['cache_hit_ratio']['per'],
-        arc['cache_hit_ratio']['num'],
-        )
-    )
-    sys.stdout.write("\tCache Miss Ratio:\t\t%s\t%s\n" % (
-        arc['cache_miss_ratio']['per'],
-        arc['cache_miss_ratio']['num'],
-        )
-    )
-
-    sys.stdout.write("\tActual Hit Ratio:\t\t%s\t%s\n" % (
-        arc['actual_hit_ratio']['per'],
-        arc['actual_hit_ratio']['num'],
-        )
-    )
-
-    sys.stdout.write("\n")
-    sys.stdout.write("\tData Demand Efficiency:\t\t%s\t%s\n" % (
-        arc['data_demand_efficiency']['per'],
-        arc['data_demand_efficiency']['num'],
-        )
-    )
-
-    if 'data_prefetch_efficiency' in arc:
-        sys.stdout.write("\tData Prefetch Efficiency:\t%s\t%s\n" % (
-            arc['data_prefetch_efficiency']['per'],
-            arc['data_prefetch_efficiency']['num'],
-            )
-        )
-    sys.stdout.write("\n")
-
-    sys.stdout.write("\tCACHE HITS BY CACHE LIST:\n")
-    if 'cache_hits_by_cache_list' in arc:
-        sys.stdout.write("\t  Anonymously Used:\t\t%s\t%s\n" % (
-            arc['cache_hits_by_cache_list']['anonymously_used']['per'],
-            arc['cache_hits_by_cache_list']['anonymously_used']['num'],
-            )
-        )
-    sys.stdout.write("\t  Most Recently Used:\t\t%s\t%s\n" % (
-        arc['most_recently_used']['per'],
-        arc['most_recently_used']['num'],
-        )
-    )
-    sys.stdout.write("\t  Most Frequently Used:\t\t%s\t%s\n" % (
-        arc['most_frequently_used']['per'],
-        arc['most_frequently_used']['num'],
-        )
-    )
-    sys.stdout.write("\t  Most Recently Used Ghost:\t%s\t%s\n" % (
-        arc['most_recently_used_ghost']['per'],
-        arc['most_recently_used_ghost']['num'],
-        )
-    )
-    sys.stdout.write("\t  Most Frequently Used Ghost:\t%s\t%s\n" % (
-        arc['most_frequently_used_ghost']['per'],
-        arc['most_frequently_used_ghost']['num'],
-        )
-    )
-
-    sys.stdout.write("\n\tCACHE HITS BY DATA TYPE:\n")
-    sys.stdout.write("\t  Demand Data:\t\t\t%s\t%s\n" % (
-        arc["cache_hits_by_data_type"]['demand_data']['per'],
-        arc["cache_hits_by_data_type"]['demand_data']['num'],
-        )
-    )
-    sys.stdout.write("\t  Prefetch Data:\t\t%s\t%s\n" % (
-        arc["cache_hits_by_data_type"]['prefetch_data']['per'],
-        arc["cache_hits_by_data_type"]['prefetch_data']['num'],
-        )
-    )
-    sys.stdout.write("\t  Demand Metadata:\t\t%s\t%s\n" % (
-        arc["cache_hits_by_data_type"]['demand_metadata']['per'],
-        arc["cache_hits_by_data_type"]['demand_metadata']['num'],
-        )
-    )
-    sys.stdout.write("\t  Prefetch Metadata:\t\t%s\t%s\n" % (
-        arc["cache_hits_by_data_type"]['prefetch_metadata']['per'],
-        arc["cache_hits_by_data_type"]['prefetch_metadata']['num'],
-        )
-    )
-
-    sys.stdout.write("\n\tCACHE MISSES BY DATA TYPE:\n")
-    sys.stdout.write("\t  Demand Data:\t\t\t%s\t%s\n" % (
-        arc["cache_misses_by_data_type"]['demand_data']['per'],
-        arc["cache_misses_by_data_type"]['demand_data']['num'],
-        )
-    )
-    sys.stdout.write("\t  Prefetch Data:\t\t%s\t%s\n" % (
-        arc["cache_misses_by_data_type"]['prefetch_data']['per'],
-        arc["cache_misses_by_data_type"]['prefetch_data']['num'],
-        )
-    )
-    sys.stdout.write("\t  Demand Metadata:\t\t%s\t%s\n" % (
-        arc["cache_misses_by_data_type"]['demand_metadata']['per'],
-        arc["cache_misses_by_data_type"]['demand_metadata']['num'],
-        )
-    )
-    sys.stdout.write("\t  Prefetch Metadata:\t\t%s\t%s\n" % (
-        arc["cache_misses_by_data_type"]['prefetch_metadata']['per'],
-        arc["cache_misses_by_data_type"]['prefetch_metadata']['num'],
-        )
-    )
-
-
-def get_l2arc_summary(Kstat):
-    """Collection information on the L2ARC"""
-
-    output = {}
-
-    l2_abort_lowmem = Kstat["kstat.zfs.misc.arcstats.l2_abort_lowmem"]
-    l2_cksum_bad = Kstat["kstat.zfs.misc.arcstats.l2_cksum_bad"]
-    l2_evict_lock_retry = Kstat["kstat.zfs.misc.arcstats.l2_evict_lock_retry"]
-    l2_evict_reading = Kstat["kstat.zfs.misc.arcstats.l2_evict_reading"]
-    l2_feeds = Kstat["kstat.zfs.misc.arcstats.l2_feeds"]
-    l2_free_on_write = Kstat["kstat.zfs.misc.arcstats.l2_free_on_write"]
-    l2_hdr_size = Kstat["kstat.zfs.misc.arcstats.l2_hdr_size"]
-    l2_hits = Kstat["kstat.zfs.misc.arcstats.l2_hits"]
-    l2_io_error = Kstat["kstat.zfs.misc.arcstats.l2_io_error"]
-    l2_misses = Kstat["kstat.zfs.misc.arcstats.l2_misses"]
-    l2_rw_clash = Kstat["kstat.zfs.misc.arcstats.l2_rw_clash"]
-    l2_size = Kstat["kstat.zfs.misc.arcstats.l2_size"]
-    l2_asize = Kstat["kstat.zfs.misc.arcstats.l2_asize"]
-    l2_writes_done = Kstat["kstat.zfs.misc.arcstats.l2_writes_done"]
-    l2_writes_error = Kstat["kstat.zfs.misc.arcstats.l2_writes_error"]
-    l2_writes_sent = Kstat["kstat.zfs.misc.arcstats.l2_writes_sent"]
-    l2_mfu_asize = Kstat["kstat.zfs.misc.arcstats.l2_mfu_asize"]
-    l2_mru_asize = Kstat["kstat.zfs.misc.arcstats.l2_mru_asize"]
-    l2_prefetch_asize = Kstat["kstat.zfs.misc.arcstats.l2_prefetch_asize"]
-    l2_bufc_data_asize = Kstat["kstat.zfs.misc.arcstats.l2_bufc_data_asize"]
-    l2_bufc_metadata_asize = Kstat["kstat.zfs.misc.arcstats.l2_bufc_metadata_asize"]
-
-    l2_access_total = (l2_hits + l2_misses)
-    output['l2_health_count'] = (l2_writes_error + l2_cksum_bad + l2_io_error)
-
-    output['l2_access_total'] = l2_access_total
-    output['l2_size'] = l2_size
-    output['l2_asize'] = l2_asize
-
-    if l2_size > 0 and l2_access_total > 0:
-
-        if output['l2_health_count'] > 0:
-            output["health"] = "DEGRADED"
-        else:
-            output["health"] = "HEALTHY"
-
-        output["low_memory_aborts"] = fHits(l2_abort_lowmem)
-        output["free_on_write"] = fHits(l2_free_on_write)
-        output["rw_clashes"] = fHits(l2_rw_clash)
-        output["bad_checksums"] = fHits(l2_cksum_bad)
-        output["io_errors"] = fHits(l2_io_error)
-
-        output["l2_arc_size"] = {}
-        output["l2_arc_size"]["adaptive"] = fBytes(l2_size)
-        output["l2_arc_size"]["actual"] = {
-            'per': fPerc(l2_asize, l2_size),
-            'num': fBytes(l2_asize)
-            }
-        output["l2_arc_size"]["head_size"] = {
-            'per': fPerc(l2_hdr_size, l2_size),
-            'num': fBytes(l2_hdr_size),
-        }
-        output["l2_arc_size"]["mfu_asize"] = {
-            'per': fPerc(l2_mfu_asize, l2_asize),
-            'num': fBytes(l2_mfu_asize),
-        }
-        output["l2_arc_size"]["mru_asize"] = {
-            'per': fPerc(l2_mru_asize, l2_asize),
-            'num': fBytes(l2_mru_asize),
-        }
-        output["l2_arc_size"]["prefetch_asize"] = {
-            'per': fPerc(l2_prefetch_asize, l2_asize),
-            'num': fBytes(l2_prefetch_asize),
-        }
-        output["l2_arc_size"]["bufc_data_asize"] = {
-            'per': fPerc(l2_bufc_data_asize, l2_asize),
-            'num': fBytes(l2_bufc_data_asize),
-        }
-        output["l2_arc_size"]["bufc_metadata_asize"] = {
-            'per': fPerc(l2_bufc_metadata_asize, l2_asize),
-            'num': fBytes(l2_bufc_metadata_asize),
-        }
-
-        output["l2_arc_evicts"] = {}
-        output["l2_arc_evicts"]['lock_retries'] = fHits(l2_evict_lock_retry)
-        output["l2_arc_evicts"]['reading'] = fHits(l2_evict_reading)
-
-        output['l2_arc_breakdown'] = {}
-        output['l2_arc_breakdown']['value'] = fHits(l2_access_total)
-        output['l2_arc_breakdown']['hit_ratio'] = {
-            'per': fPerc(l2_hits, l2_access_total),
-            'num': fHits(l2_hits),
-        }
-        output['l2_arc_breakdown']['miss_ratio'] = {
-            'per': fPerc(l2_misses, l2_access_total),
-            'num': fHits(l2_misses),
-        }
-        output['l2_arc_breakdown']['feeds'] = fHits(l2_feeds)
-
-        output['l2_arc_buffer'] = {}
-
-        output['l2_arc_writes'] = {}
-        output['l2_writes_done'] = l2_writes_done
-        output['l2_writes_sent'] = l2_writes_sent
-        if l2_writes_done != l2_writes_sent:
-            output['l2_arc_writes']['writes_sent'] = {
-                'value': "FAULTED",
-                'num': fHits(l2_writes_sent),
-            }
-            output['l2_arc_writes']['done_ratio'] = {
-                'per': fPerc(l2_writes_done, l2_writes_sent),
-                'num': fHits(l2_writes_done),
-            }
-            output['l2_arc_writes']['error_ratio'] = {
-                'per': fPerc(l2_writes_error, l2_writes_sent),
-                'num': fHits(l2_writes_error),
-            }
-        else:
-            output['l2_arc_writes']['writes_sent'] = {
-                'per': fPerc(100),
-                'num': fHits(l2_writes_sent),
-            }
-
-    return output
-
-
-def _l2arc_summary(Kstat):
-    """Print information on the L2ARC"""
-
-    arc = get_l2arc_summary(Kstat)
-
-    if arc['l2_size'] > 0 and arc['l2_access_total'] > 0:
-        sys.stdout.write("L2 ARC Summary: ")
-        if arc['l2_health_count'] > 0:
-            sys.stdout.write("(DEGRADED)\n")
-        else:
-            sys.stdout.write("(HEALTHY)\n")
-        sys.stdout.write("\tLow Memory Aborts:\t\t\t%s\n" %
-                         arc['low_memory_aborts'])
-        sys.stdout.write("\tFree on Write:\t\t\t\t%s\n" % arc['free_on_write'])
-        sys.stdout.write("\tR/W Clashes:\t\t\t\t%s\n" % arc['rw_clashes'])
-        sys.stdout.write("\tBad Checksums:\t\t\t\t%s\n" % arc['bad_checksums'])
-        sys.stdout.write("\tIO Errors:\t\t\t\t%s\n" % arc['io_errors'])
-        sys.stdout.write("\n")
-
-        sys.stdout.write("L2 ARC Size: (Adaptive)\t\t\t\t%s\n" %
-                         arc["l2_arc_size"]["adaptive"])
-        sys.stdout.write("\tCompressed:\t\t\t%s\t%s\n" % (
-            arc["l2_arc_size"]["actual"]["per"],
-            arc["l2_arc_size"]["actual"]["num"],
-            )
-        )
-        sys.stdout.write("\tHeader Size:\t\t\t%s\t%s\n" % (
-            arc["l2_arc_size"]["head_size"]["per"],
-            arc["l2_arc_size"]["head_size"]["num"],
-            )
-        )
-        sys.stdout.write("\tMFU Alloc. Size:\t\t%s\t%s\n" % (
-            arc["l2_arc_size"]["mfu_asize"]["per"],
-            arc["l2_arc_size"]["mfu_asize"]["num"],
-            )
-        )
-        sys.stdout.write("\tMRU Alloc. Size:\t\t%s\t%s\n" % (
-            arc["l2_arc_size"]["mru_asize"]["per"],
-            arc["l2_arc_size"]["mru_asize"]["num"],
-            )
-        )
-        sys.stdout.write("\tPrefetch Alloc. Size:\t\t%s\t%s\n" % (
-            arc["l2_arc_size"]["prefetch_asize"]["per"],
-            arc["l2_arc_size"]["prefetch_asize"]["num"],
-            )
-        )
-        sys.stdout.write("\tData (buf content) Alloc. Size:\t%s\t%s\n" % (
-            arc["l2_arc_size"]["bufc_data_asize"]["per"],
-            arc["l2_arc_size"]["bufc_data_asize"]["num"],
-            )
-        )
-        sys.stdout.write("\tMetadata (buf content) Size:\t%s\t%s\n" % (
-            arc["l2_arc_size"]["bufc_metadata_asize"]["per"],
-            arc["l2_arc_size"]["bufc_metadata_asize"]["num"],
-            )
-        )
-        sys.stdout.write("\n")
-
-        if arc["l2_arc_evicts"]['lock_retries'] != '0' or \
-           arc["l2_arc_evicts"]["reading"] != '0':
-            sys.stdout.write("L2 ARC Evictions:\n")
-            sys.stdout.write("\tLock Retries:\t\t\t\t%s\n" %
-                             arc["l2_arc_evicts"]['lock_retries'])
-            sys.stdout.write("\tUpon Reading:\t\t\t\t%s\n" %
-                             arc["l2_arc_evicts"]["reading"])
-            sys.stdout.write("\n")
-
-        sys.stdout.write("L2 ARC Breakdown:\t\t\t\t%s\n" %
-                         arc['l2_arc_breakdown']['value'])
-        sys.stdout.write("\tHit Ratio:\t\t\t%s\t%s\n" % (
-            arc['l2_arc_breakdown']['hit_ratio']['per'],
-            arc['l2_arc_breakdown']['hit_ratio']['num'],
-            )
-        )
-
-        sys.stdout.write("\tMiss Ratio:\t\t\t%s\t%s\n" % (
-            arc['l2_arc_breakdown']['miss_ratio']['per'],
-            arc['l2_arc_breakdown']['miss_ratio']['num'],
-            )
-        )
-
-        sys.stdout.write("\tFeeds:\t\t\t\t\t%s\n" %
-                         arc['l2_arc_breakdown']['feeds'])
-        sys.stdout.write("\n")
-
-        sys.stdout.write("L2 ARC Writes:\n")
-        if arc['l2_writes_done'] != arc['l2_writes_sent']:
-            sys.stdout.write("\tWrites Sent: (%s)\t\t\t\t%s\n" % (
-                arc['l2_arc_writes']['writes_sent']['value'],
-                arc['l2_arc_writes']['writes_sent']['num'],
-                )
-            )
-            sys.stdout.write("\t  Done Ratio:\t\t\t%s\t%s\n" % (
-                arc['l2_arc_writes']['done_ratio']['per'],
-                arc['l2_arc_writes']['done_ratio']['num'],
-                )
-            )
-            sys.stdout.write("\t  Error Ratio:\t\t\t%s\t%s\n" % (
-                arc['l2_arc_writes']['error_ratio']['per'],
-                arc['l2_arc_writes']['error_ratio']['num'],
-                )
-            )
-        else:
-            sys.stdout.write("\tWrites Sent:\t\t\t%s\t%s\n" % (
-                arc['l2_arc_writes']['writes_sent']['per'],
-                arc['l2_arc_writes']['writes_sent']['num'],
-                )
-            )
-
-
-def get_dmu_summary(Kstat):
-    """Collect information on the DMU"""
-
-    output = {}
-
-    zfetch_hits = Kstat["kstat.zfs.misc.zfetchstats.hits"]
-    zfetch_misses = Kstat["kstat.zfs.misc.zfetchstats.misses"]
-
-    zfetch_access_total = (zfetch_hits + zfetch_misses)
-    output['zfetch_access_total'] = zfetch_access_total
-
-    if zfetch_access_total > 0:
-        output['dmu'] = {}
-        output['dmu']['efficiency'] = {}
-        output['dmu']['efficiency']['value'] = fHits(zfetch_access_total)
-        output['dmu']['efficiency']['hit_ratio'] = {
-            'per': fPerc(zfetch_hits, zfetch_access_total),
-            'num': fHits(zfetch_hits),
-        }
-        output['dmu']['efficiency']['miss_ratio'] = {
-            'per': fPerc(zfetch_misses, zfetch_access_total),
-            'num': fHits(zfetch_misses),
-        }
-
-    return output
-
-
-def _dmu_summary(Kstat):
-    """Print information on the DMU"""
-
-    arc = get_dmu_summary(Kstat)
-
-    if arc['zfetch_access_total'] > 0:
-        sys.stdout.write("DMU Prefetch Efficiency:\t\t\t\t\t%s\n" %
-                         arc['dmu']['efficiency']['value'])
-        sys.stdout.write("\tHit Ratio:\t\t\t%s\t%s\n" % (
-            arc['dmu']['efficiency']['hit_ratio']['per'],
-            arc['dmu']['efficiency']['hit_ratio']['num'],
-            )
-        )
-        sys.stdout.write("\tMiss Ratio:\t\t\t%s\t%s\n" % (
-            arc['dmu']['efficiency']['miss_ratio']['per'],
-            arc['dmu']['efficiency']['miss_ratio']['num'],
-            )
-        )
-
-        sys.stdout.write("\n")
-
-
-def get_vdev_summary(Kstat):
-    """Collect information on the VDEVs"""
-
-    output = {}
-
-    vdev_cache_delegations = \
-        Kstat["kstat.zfs.misc.vdev_cache_stats.delegations"]
-    vdev_cache_misses = Kstat["kstat.zfs.misc.vdev_cache_stats.misses"]
-    vdev_cache_hits = Kstat["kstat.zfs.misc.vdev_cache_stats.hits"]
-    vdev_cache_total = (vdev_cache_misses + vdev_cache_hits +
-                        vdev_cache_delegations)
-
-    output['vdev_cache_total'] = vdev_cache_total
-
-    if vdev_cache_total > 0:
-        output['summary'] = fHits(vdev_cache_total)
-        output['hit_ratio'] = {
-            'per': fPerc(vdev_cache_hits, vdev_cache_total),
-            'num': fHits(vdev_cache_hits),
-        }
-        output['miss_ratio'] = {
-            'per': fPerc(vdev_cache_misses, vdev_cache_total),
-            'num': fHits(vdev_cache_misses),
-        }
-        output['delegations'] = {
-            'per': fPerc(vdev_cache_delegations, vdev_cache_total),
-            'num': fHits(vdev_cache_delegations),
-        }
-
-    return output
-
-
-def _vdev_summary(Kstat):
-    """Print information on the VDEVs"""
-
-    arc = get_vdev_summary(Kstat)
-
-    if arc['vdev_cache_total'] > 0:
-        sys.stdout.write("VDEV Cache Summary:\t\t\t\t%s\n" % arc['summary'])
-        sys.stdout.write("\tHit Ratio:\t\t\t%s\t%s\n" % (
-            arc['hit_ratio']['per'],
-            arc['hit_ratio']['num'],
-        ))
-        sys.stdout.write("\tMiss Ratio:\t\t\t%s\t%s\n" % (
-            arc['miss_ratio']['per'],
-            arc['miss_ratio']['num'],
-        ))
-        sys.stdout.write("\tDelegations:\t\t\t%s\t%s\n" % (
-            arc['delegations']['per'],
-            arc['delegations']['num'],
-        ))
-
-
-def _tunable_summary(Kstat):
-    """Print information on tunables, including descriptions if requested"""
-
-    global show_tunable_descriptions
-    global alternate_tunable_layout
-
-    tunables = load_tunables()
-    descriptions = {}
-
-    if show_tunable_descriptions:
-
-        command = ["/sbin/modinfo", "zfs", "-0"]
-
-        try:
-            p = Popen(command, stdin=PIPE, stdout=PIPE,
-                      stderr=PIPE, shell=False, close_fds=True)
-            p.wait()
-
-            # By default, Python 2 returns a string as the first element of the
-            # tuple from p.communicate(), while Python 3 returns bytes which
-            # must be decoded first. The better way to do this would be with
-            # subprocess.run() or at least .check_output(), but this fails on
-            # CentOS 6 because of its old version of Python 2
-            desc = bytes.decode(p.communicate()[0])
-            description_list = desc.strip().split('\0')
-
-            if p.returncode == 0:
-                for tunable in description_list:
-                    if tunable[0:5] == 'parm:':
-                        tunable = tunable[5:].strip()
-                        name, description = tunable.split(':', 1)
-                        if not description:
-                            description = "Description unavailable"
-                        descriptions[name] = description
-            else:
-                sys.stderr.write("%s: '%s' exited with code %i\n" %
-                                 (sys.argv[0], command[0], p.returncode))
-                sys.stderr.write("Tunable descriptions will be disabled.\n")
-        except OSError as e:
-            sys.stderr.write("%s: Cannot run '%s': %s\n" %
-                             (sys.argv[0], command[0], e.strerror))
-            sys.stderr.write("Tunable descriptions will be disabled.\n")
-
-    sys.stdout.write("ZFS Tunables:\n")
-
-    if alternate_tunable_layout:
-        fmt = "\t%s=%s\n"
-    else:
-        fmt = "\t%-50s%s\n"
-
-    for name in sorted(tunables.keys()):
-        if show_tunable_descriptions and name in descriptions:
-            sys.stdout.write("\t# %s\n" % descriptions[name])
-
-        sys.stdout.write(fmt % (name, tunables[name]))
-
-
-unSub = [
-    _arc_summary,
-    _arc_efficiency,
-    _l2arc_summary,
-    _dmu_summary,
-    _vdev_summary,
-    _tunable_summary
-]
-
-
-def zfs_header():
-    """Print title string with date"""
-
-    daydate = time.strftime('%a %b %d %H:%M:%S %Y')
-
-    sys.stdout.write('\n'+'-'*72+'\n')
-    sys.stdout.write('ZFS Subsystem Report\t\t\t\t%s' % daydate)
-    sys.stdout.write('\n')
-
-
-def usage():
-    """Print usage information"""
-
-    sys.stdout.write("Usage: arc_summary [-h] [-a] [-d] [-p PAGE]\n\n")
-    sys.stdout.write("\t -h, --help           : "
-                     "Print this help message and exit\n")
-    sys.stdout.write("\t -a, --alternate      : "
-                     "Show an alternate sysctl layout\n")
-    sys.stdout.write("\t -d, --description    : "
-                     "Show the sysctl descriptions\n")
-    sys.stdout.write("\t -p PAGE, --page=PAGE : "
-                     "Select a single output page to display,\n")
-    sys.stdout.write("\t                        "
-                     "should be an integer between 1 and " +
-                     str(len(unSub)) + "\n\n")
-    sys.stdout.write("Examples:\n")
-    sys.stdout.write("\tarc_summary -a\n")
-    sys.stdout.write("\tarc_summary -p 4\n")
-    sys.stdout.write("\tarc_summary -ad\n")
-    sys.stdout.write("\tarc_summary --page=2\n")
-
-
-def main():
-    """Main function"""
-
-    global show_tunable_descriptions
-    global alternate_tunable_layout
-
-    try:
-        try:
-            opts, args = getopt.getopt(
-                sys.argv[1:],
-                "adp:h", ["alternate", "description", "page=", "help"]
-            )
-        except getopt.error as e:
-            sys.stderr.write("Error: %s\n" % e.msg)
-            usage()
-            sys.exit(1)
-
-        args = {}
-        for opt, arg in opts:
-            if opt in ('-a', '--alternate'):
-                args['a'] = True
-            if opt in ('-d', '--description'):
-                args['d'] = True
-            if opt in ('-p', '--page'):
-                args['p'] = arg
-            if opt in ('-h', '--help'):
-                usage()
-                sys.exit(0)
-
-        Kstat = get_Kstat()
-
-        alternate_tunable_layout = 'a' in args
-        show_tunable_descriptions = 'd' in args
-
-        pages = []
-
-        if 'p' in args:
-            try:
-                pages.append(unSub[int(args['p']) - 1])
-            except IndexError:
-                sys.stderr.write('the argument to -p must be between 1 and ' +
-                                 str(len(unSub)) + '\n')
-                sys.exit(1)
-        else:
-            pages = unSub
-
-        zfs_header()
-        for page in pages:
-            page(Kstat)
-            sys.stdout.write("\n")
-    except IOError as ex:
-        if (ex.errno == errno.EPIPE):
-            sys.exit(0)
-        raise
-    except KeyboardInterrupt:
-        sys.exit(0)
-
-
-if __name__ == '__main__':
-    main()
diff --git a/cmd/arc_summary/arc_summary3 b/cmd/arc_summary/arc_summary3
index 301c485b34..9d0c2d30dd 100755
--- a/cmd/arc_summary/arc_summary3
+++ b/cmd/arc_summary/arc_summary3
@@ -191,21 +191,13 @@ elif sys.platform.startswith('linux'):
         # there, so we fall back on modinfo
         command = ["/sbin/modinfo", request, "-0"]
 
-        # The recommended way to do this is with subprocess.run(). However,
-        # some installed versions of Python are < 3.5, so we offer them
-        # the option of doing it the old way (for now)
         info = ''
 
         try:
 
-            if 'run' in dir(subprocess):
-                info = subprocess.run(command, stdout=subprocess.PIPE,
-                                      universal_newlines=True)
-                raw_output = info.stdout.split('\0')
-            else:
-                info = subprocess.check_output(command,
-                                               universal_newlines=True)
-                raw_output = info.split('\0')
+            info = subprocess.run(command, stdout=subprocess.PIPE,
+                                  check=True, universal_newlines=True)
+            raw_output = info.stdout.split('\0')
 
         except subprocess.CalledProcessError:
             print("Error: Descriptions not available",
diff --git a/cmd/arcstat/arcstat.in b/cmd/arcstat/arcstat.in
index 425e52d1f5..0128fd8175 100755
--- a/cmd/arcstat/arcstat.in
+++ b/cmd/arcstat/arcstat.in
@@ -47,7 +47,7 @@
 # @hdr is the array of fields that needs to be printed, so we
 # just iterate over this array and print the values using our pretty printer.
 #
-# This script must remain compatible with Python 2.6+ and Python 3.4+.
+# This script must remain compatible with Python 3.6+.
 #
 
 import sys
diff --git a/cmd/dbufstat/dbufstat.in b/cmd/dbufstat/dbufstat.in
index 82250353f5..b716a0c974 100755
--- a/cmd/dbufstat/dbufstat.in
+++ b/cmd/dbufstat/dbufstat.in
@@ -27,7 +27,7 @@
 # Copyright (C) 2013 Lawrence Livermore National Security, LLC.
 # Produced at Lawrence Livermore National Laboratory (cf, DISCLAIMER).
 #
-# This script must remain compatible with Python 2.6+ and Python 3.4+.
+# This script must remain compatible with and Python 3.6+.
 #
 
 import sys
diff --git a/config/always-python.m4 b/config/always-python.m4
index 5f47df424c..5a2008124f 100644
--- a/config/always-python.m4
+++ b/config/always-python.m4
@@ -1,7 +1,6 @@
 dnl #
 dnl # The majority of the python scripts are written to be compatible
-dnl # with Python 2.6 and Python 3.4.  Therefore, they may be installed
-dnl # and used with either interpreter.  This option is intended to
+dnl # with Python 3.6. This option is intended to
 dnl # to provide a method to specify the default system version, and
 dnl # set the PYTHON environment variable accordingly.
 dnl #
@@ -13,9 +12,7 @@ AC_DEFUN([ZFS_AC_CONFIG_ALWAYS_PYTHON], [
 		[with_python=check])
 
 	AS_CASE([$with_python],
-		[check], [AC_CHECK_PROGS([PYTHON], [python3 python2], [:])],
-		[2*], [PYTHON="python${with_python}"],
-		[*python2*], [PYTHON="${with_python}"],
+		[check], [AC_CHECK_PROGS([PYTHON], [python3], [:])],
 		[3*], [PYTHON="python${with_python}"],
 		[*python3*], [PYTHON="${with_python}"],
 		[no], [PYTHON=":"],
@@ -23,8 +20,7 @@ AC_DEFUN([ZFS_AC_CONFIG_ALWAYS_PYTHON], [
 	)
 
 	dnl #
-	dnl # Minimum supported Python versions for utilities:
-	dnl # Python 2.6 or Python 3.4
+	dnl # Minimum supported Python versions for utilities: Python 3.6
 	dnl #
 	AM_PATH_PYTHON([], [], [:])
 	AS_IF([test -z "$PYTHON_VERSION"], [
@@ -33,25 +29,16 @@ AC_DEFUN([ZFS_AC_CONFIG_ALWAYS_PYTHON], [
 	PYTHON_MINOR=${PYTHON_VERSION#*\.}
 
 	AS_CASE([$PYTHON_VERSION],
-		[2.*], [
-			AS_IF([test $PYTHON_MINOR -lt 6],
-				[AC_MSG_ERROR("Python >= 2.6 is required")])
-		],
 		[3.*], [
-			AS_IF([test $PYTHON_MINOR -lt 4],
-				[AC_MSG_ERROR("Python >= 3.4 is required")])
+			AS_IF([test $PYTHON_MINOR -lt 6],
+				[AC_MSG_ERROR("Python >= 3.6 is required")])
 		],
 		[:|2|3], [],
 		[PYTHON_VERSION=3]
 	)
 
 	AM_CONDITIONAL([USING_PYTHON], [test "$PYTHON" != :])
-	AM_CONDITIONAL([USING_PYTHON_2], [test "x${PYTHON_VERSION%%\.*}" = x2])
-	AM_CONDITIONAL([USING_PYTHON_3], [test "x${PYTHON_VERSION%%\.*}" = x3])
-
-	AM_COND_IF([USING_PYTHON_2],
-		[AC_SUBST([PYTHON_SHEBANG], [python2])],
-		[AC_SUBST([PYTHON_SHEBANG], [python3])])
+	AC_SUBST([PYTHON_SHEBANG], [python3])
 
 	dnl #
 	dnl # Request that packages be built for a specific Python version.
diff --git a/config/always-pyzfs.m4 b/config/always-pyzfs.m4
index efea49f5f0..9b123b1b2d 100644
--- a/config/always-pyzfs.m4
+++ b/config/always-pyzfs.m4
@@ -18,7 +18,7 @@ AC_DEFUN([ZFS_AC_PYTHON_MODULE], [
 ])
 
 dnl #
-dnl # Determines if pyzfs can be built, requires Python 2.7 or later.
+dnl # Determines if pyzfs can be built, requires Python 3.6 or later.
 dnl #
 AC_DEFUN([ZFS_AC_CONFIG_ALWAYS_PYZFS], [
 	AC_ARG_ENABLE([pyzfs],
@@ -72,12 +72,11 @@ AC_DEFUN([ZFS_AC_CONFIG_ALWAYS_PYZFS], [
 	])
 
 	dnl #
-	dnl # Require python-devel libraries
+	dnl # Require python3-devel libraries
 	dnl #
 	AS_IF([test "x$enable_pyzfs" = xcheck  -o "x$enable_pyzfs" = xyes], [
 		AS_CASE([$PYTHON_VERSION],
-			[3.*], [PYTHON_REQUIRED_VERSION=">= '3.4.0'"],
-			[2.*], [PYTHON_REQUIRED_VERSION=">= '2.7.0'"],
+			[3.*], [PYTHON_REQUIRED_VERSION=">= '3.6.0'"],
 			[AC_MSG_ERROR("Python $PYTHON_VERSION unknown")]
 		)
 
diff --git a/contrib/pyzfs/setup.py.in b/contrib/pyzfs/setup.py.in
index bd8ffc728f..934b3189eb 100644
--- a/contrib/pyzfs/setup.py.in
+++ b/contrib/pyzfs/setup.py.in
@@ -29,13 +29,12 @@ setup(
         "Development Status :: 4 - Beta",
         "Intended Audience :: Developers",
         "License :: OSI Approved :: Apache Software License",
-        "Programming Language :: Python :: 2",
-        "Programming Language :: Python :: 2.7",
         "Programming Language :: Python :: 3",
-        "Programming Language :: Python :: 3.4",
-        "Programming Language :: Python :: 3.5",
         "Programming Language :: Python :: 3.6",
         "Programming Language :: Python :: 3.7",
+        "Programming Language :: Python :: 3.8",
+        "Programming Language :: Python :: 3.9",
+        "Programming Language :: Python :: 3.10",
         "Topic :: System :: Filesystems",
         "Topic :: Software Development :: Libraries",
     ],
@@ -53,7 +52,7 @@ setup(
     setup_requires=[
         "cffi",
     ],
-    python_requires='>=2.7,!=3.0.*,!=3.1.*,!=3.2.*,!=3.3.*,<4',
+    python_requires='>=3.6,<4',
     zip_safe=False,
     test_suite="libzfs_core.test",
 )
diff --git a/rpm/generic/zfs.spec.in b/rpm/generic/zfs.spec.in
index 0fafd192f1..3dce92acbb 100644
--- a/rpm/generic/zfs.spec.in
+++ b/rpm/generic/zfs.spec.in
@@ -3,7 +3,7 @@
 
 # Set the default udev directory based on distribution.
 %if %{undefined _udevdir}
-%if 0%{?fedora} >= 17 || 0%{?rhel} >= 7 || 0%{?centos} >= 7 || 0%{?openEuler}
+%if 0%{?fedora}%{?rhel}%{?centos}%{?openEuler}
 %global _udevdir    %{_prefix}/lib/udev
 %else
 %global _udevdir    /lib/udev
@@ -12,7 +12,7 @@
 
 # Set the default udevrule directory based on distribution.
 %if %{undefined _udevruledir}
-%if 0%{?fedora} >= 17 || 0%{?rhel} >= 7 || 0%{?centos} >= 7 || 0%{?openEuler}
+%if 0%{?fedora}%{?rhel}%{?centos}%{?openEuler}
 %global _udevruledir    %{_prefix}/lib/udev/rules.d
 %else
 %global _udevruledir    /lib/udev/rules.d
@@ -21,7 +21,7 @@
 
 # Set the default dracut directory based on distribution.
 %if %{undefined _dracutdir}
-%if 0%{?fedora} >= 17 || 0%{?rhel} >= 7 || 0%{?centos} >= 7 || 0%{?openEuler}
+%if 0%{?fedora}%{?rhel}%{?centos}%{?openEuler}
 %global _dracutdir  %{_prefix}/lib/dracut
 %else
 %global _dracutdir  %{_prefix}/share/dracut
@@ -57,64 +57,28 @@
 %bcond_with    asan
 %bcond_with    systemd
 %bcond_with    pam
+%bcond_without pyzfs
 
 # Generic enable switch for systemd
 %if %{with systemd}
 %define _systemd 1
 %endif
 
-# RHEL >= 7 comes with systemd
-%if 0%{?rhel} >= 7
+# Distros below support systemd
+%if 0%{?rhel}%{?fedora}%{?centos}%{?suse_version}
 %define _systemd 1
 %endif
 
-# Fedora >= 15 comes with systemd, but only >= 18 has
-# the proper macros
-%if 0%{?fedora} >= 18
-%define _systemd 1
-%endif
-
-# opensuse >= 12.1 comes with systemd, but only >= 13.1
-# has the proper macros
-%if 0%{?suse_version} >= 1310
-%define _systemd 1
-%endif
-
-# openEuler comes with systemd
-%if 0%{?openEuler}
-%define _systemd 1
-%endif
-
-# When not specified default to distribution provided version.  This
-# is normally Python 3, but for RHEL <= 7 only Python 2 is provided.
+# When not specified default to distribution provided version.
 %if %{undefined __use_python}
-%if 0%{?rhel} && 0%{?rhel} <= 7
-%define __python                  /usr/bin/python2
-%define __python_pkg_version      2
-%define __python_cffi_pkg         python-cffi
-%define __python_setuptools_pkg   python-setuptools
-%else
 %define __python                  /usr/bin/python3
 %define __python_pkg_version      3
-%define __python_cffi_pkg         python3-cffi
-%define __python_setuptools_pkg   python3-setuptools
-%endif
 %else
 %define __python                  %{__use_python}
 %define __python_pkg_version      %{__use_python_pkg_version}
-%define __python_cffi_pkg         python%{__python_pkg_version}-cffi
-%define __python_setuptools_pkg   python%{__python_pkg_version}-setuptools
 %endif
 %define __python_sitelib          %(%{__python} -Esc "from distutils.sysconfig import get_python_lib; print(get_python_lib())")
 
-# By default python-pyzfs is enabled, with the exception of
-# RHEL 6 which by default uses Python 2.6 which is too old.
-%if 0%{?rhel} == 6
-%bcond_with    pyzfs
-%else
-%bcond_without pyzfs
-%endif
-
 Name:           @PACKAGE@
 Version:        @VERSION@
 Release:        @RELEASE@%{?dist}
@@ -137,7 +101,7 @@ Obsoletes:      spl <= %{version}
 # Renaming those on either side would conflict with all available documentation.
 Conflicts:      zfs-fuse
 
-%if 0%{?rhel}%{?fedora}%{?suse_version}%{?openEuler}
+%if 0%{?rhel}%{?centos}%{?fedora}%{?suse_version}%{?openEuler}
 BuildRequires:  gcc, make
 BuildRequires:  zlib-devel
 BuildRequires:  libuuid-devel
@@ -290,7 +254,7 @@ Requires:       sudo
 Requires:       sysstat
 Requires:       libaio
 Requires:       python%{__python_pkg_version}
-%if 0%{?rhel}%{?fedora}%{?suse_version}%{?openEuler}
+%if 0%{?rhel}%{?centos}%{?fedora}%{?suse_version}%{?openEuler}
 BuildRequires:  libaio-devel
 %endif
 AutoReqProv:    no
@@ -313,6 +277,8 @@ This package contains a dracut module used to construct an initramfs
 image which is ZFS aware.
 
 %if %{with pyzfs}
+# Enforce `python36-` package prefix for CentOS 7
+# since dependencies come from EPEL and are named this way
 %package -n python%{__python_pkg_version}-pyzfs
 Summary:        Python %{python_version} wrapper for libzfs_core
 Group:          Development/Languages/Python
@@ -322,16 +288,26 @@ Requires:       libzfs5 = %{version}-%{release}
 Requires:       libnvpair3 = %{version}-%{release}
 Requires:       libffi
 Requires:       python%{__python_pkg_version}
-Requires:       %{__python_cffi_pkg}
-%if 0%{?rhel}%{?fedora}%{?suse_version}%{?openEuler}
-%if 0%{?rhel} >= 8 || 0%{?centos} >= 8 || 0%{?fedora} >= 28 || 0%{?openEuler}
-BuildRequires:  python3-packaging
+
+%if 0%{?centos} == 7
+Requires:       python36-cffi
 %else
-BuildRequires:  python-packaging
+Requires:       python%{__python_pkg_version}-cffi
 %endif
+
+%if 0%{?rhel}%{?centos}%{?fedora}%{?suse_version}%{?openEuler}
+%if 0%{?centos} == 7
+BuildRequires:  python36-packaging
+BuildRequires:  python36-devel
+BuildRequires:  python36-cffi
+BuildRequires:  python36-setuptools
+%else
+BuildRequires:  python%{__python_pkg_version}-packaging
 BuildRequires:  python%{__python_pkg_version}-devel
-BuildRequires:  %{__python_cffi_pkg}
-BuildRequires:  %{__python_setuptools_pkg}
+BuildRequires:  python%{__python_pkg_version}-cffi
+BuildRequires:  python%{__python_pkg_version}-setuptools
+%endif
+
 BuildRequires:  libffi-devel
 %endif
 
@@ -490,7 +466,7 @@ systemctl --system daemon-reload >/dev/null || true
 %{_bindir}/raidz_test
 %{_sbindir}/zgenhostid
 %{_bindir}/zvol_wait
-# Optional Python 2/3 scripts
+# Optional Python 3 scripts
 %{_bindir}/arc_summary
 %{_bindir}/arcstat
 %{_bindir}/dbufstat
diff --git a/tests/test-runner/bin/test-runner.py.in b/tests/test-runner/bin/test-runner.py.in
index 4e439d2b56..a652d3d4a0 100755
--- a/tests/test-runner/bin/test-runner.py.in
+++ b/tests/test-runner/bin/test-runner.py.in
@@ -15,19 +15,14 @@
 # Copyright (c) 2012, 2018 by Delphix. All rights reserved.
 # Copyright (c) 2019 Datto Inc.
 #
-# This script must remain compatible with Python 2.6+ and Python 3.4+.
+# This script must remain compatible with Python 3.6+.
 #
 
-# some python 2.7 system don't have a configparser shim
-try:
-    import configparser
-except ImportError:
-    import ConfigParser as configparser
-
 import os
 import sys
 import ctypes
 import re
+import configparser
 
 from datetime import datetime
 from optparse import OptionParser
@@ -38,7 +33,7 @@ from subprocess import PIPE
 from subprocess import Popen
 from subprocess import check_output
 from threading import Timer
-from time import time
+from time import time, CLOCK_MONOTONIC_RAW
 from os.path import exists
 
 BASEDIR = '/var/tmp/test_results'
@@ -52,9 +47,6 @@ LOG_OUT = 'LOG_OUT'
 LOG_ERR = 'LOG_ERR'
 LOG_FILE_OBJ = None
 
-# some python 2.7 system don't have a concept of monotonic time
-CLOCK_MONOTONIC_RAW = 4  # see <linux/time.h>
-
 
 class timespec(ctypes.Structure):
     _fields_ = [
diff --git a/tests/test-runner/bin/zts-report.py.in b/tests/test-runner/bin/zts-report.py.in
index 71b0cc8d64..432899c21f 100755
--- a/tests/test-runner/bin/zts-report.py.in
+++ b/tests/test-runner/bin/zts-report.py.in
@@ -15,7 +15,7 @@
 # Copyright (c) 2017 by Delphix. All rights reserved.
 # Copyright (c) 2018 by Lawrence Livermore National Security, LLC.
 #
-# This script must remain compatible with Python 2.6+ and Python 3.4+.
+# This script must remain compatible with Python 3.6+.
 #
 
 import os
@@ -62,13 +62,13 @@ known_reason = 'Known issue'
 exec_reason = 'Test user execute permissions required for utilities'
 
 #
-# Some tests require a minimum python version of 3.5 and will be skipped when
+# Some tests require a minimum python version of 3.6 and will be skipped when
 # the default system version is too old.  There may also be tests which require
-# additional python modules be installed, for example python-cffi is required
+# additional python modules be installed, for example python3-cffi is required
 # by the pyzfs tests.
 #
-python_reason = 'Python v3.5 or newer required'
-python_deps_reason = 'Python modules missing: python-cffi'
+python_reason = 'Python v3.6 or newer required'
+python_deps_reason = 'Python modules missing: python3-cffi'
 
 #
 # Some tests require the O_TMPFILE flag which was first introduced in the
diff --git a/tests/zfs-tests/include/commands.cfg b/tests/zfs-tests/include/commands.cfg
index a565ea8d51..78802c9fb9 100644
--- a/tests/zfs-tests/include/commands.cfg
+++ b/tests/zfs-tests/include/commands.cfg
@@ -70,8 +70,6 @@ export SYSTEM_FILES_COMMON='arp
     printf
     ps
     pwd
-    python
-    python2
     python3
     quotaon
     readlink
diff --git a/tests/zfs-tests/tests/functional/cli_root/zfs_program/zfs_program_json.ksh b/tests/zfs-tests/tests/functional/cli_root/zfs_program/zfs_program_json.ksh
index 3788543b0b..b0265c5ee4 100755
--- a/tests/zfs-tests/tests/functional/cli_root/zfs_program/zfs_program_json.ksh
+++ b/tests/zfs-tests/tests/functional/cli_root/zfs_program/zfs_program_json.ksh
@@ -92,27 +92,13 @@ typeset -a pos_cmds_out=(
     }
 }")
 
-#
-# N.B. json.tool is needed to guarantee consistent ordering of fields,
-# sed is needed to trim trailing space in CentOS 6's json.tool output
-#
-# As of Python 3.5 the behavior of json.tool changed to keep the order
-# the same as the input and the --sort-keys option was added.  Detect when
-# --sort-keys is supported and apply the option to ensure the expected order.
-#
-if python -m json.tool --sort-keys <<< "{}"; then
-	JSON_TOOL_CMD="python -m json.tool --sort-keys"
-else
-	JSON_TOOL_CMD="python -m json.tool"
-fi
-
 typeset -i cnt=0
 typeset cmd
 for cmd in ${pos_cmds[@]}; do
 	log_must zfs program $TESTPOOL $TESTZCP $TESTDS $cmd 2>&1
 	log_must zfs program -j $TESTPOOL $TESTZCP $TESTDS $cmd 2>&1
 	OUTPUT=$(zfs program -j $TESTPOOL $TESTZCP $TESTDS $cmd 2>&1 |
-	    $JSON_TOOL_CMD | sed 's/[[:space:]]*$//')
+	    python3 -m json.tool --sort-keys)
 	if [ "$OUTPUT" != "${pos_cmds_out[$cnt]}" ]; then
 		log_note "Got     :$OUTPUT"
 		log_note "Expected:${pos_cmds_out[$cnt]}"
diff --git a/tests/zfs-tests/tests/functional/pyzfs/pyzfs_unittest.ksh.in b/tests/zfs-tests/tests/functional/pyzfs/pyzfs_unittest.ksh.in
index 4ca610e5f1..1f58d8116b 100755
--- a/tests/zfs-tests/tests/functional/pyzfs/pyzfs_unittest.ksh.in
+++ b/tests/zfs-tests/tests/functional/pyzfs/pyzfs_unittest.ksh.in
@@ -30,7 +30,7 @@ verify_runnable "global"
 # Verify that the required dependencies for testing are installed.
 @PYTHON@ -c "import cffi" 2>/dev/null
 if [ $? -eq 1 ]; then
-	log_unsupported "python-cffi not found by Python"
+	log_unsupported "python3-cffi not found by Python"
 fi
 
 # We don't just try to "import libzfs_core" because we want to skip these tests
diff --git a/tests/zfs-tests/tests/functional/rsend/send_encrypted_files.ksh b/tests/zfs-tests/tests/functional/rsend/send_encrypted_files.ksh
index 370f5382eb..661fbe85db 100755
--- a/tests/zfs-tests/tests/functional/rsend/send_encrypted_files.ksh
+++ b/tests/zfs-tests/tests/functional/rsend/send_encrypted_files.ksh
@@ -87,7 +87,7 @@ log_must xattrtest -f 10 -x 3 -s 32768 -r -k -p /$TESTPOOL/$TESTFS2/xattrsadir
 # OpenZFS issue #7432
 log_must zfs set compression=on xattr=sa $TESTPOOL/$TESTFS2
 log_must touch /$TESTPOOL/$TESTFS2/attrs
-log_must eval "python -c 'print \"a\" * 4096' | \
+log_must eval "python3 -c 'print \"a\" * 4096' | \
 	set_xattr_stdin bigval /$TESTPOOL/$TESTFS2/attrs"
 log_must zfs set compression=off xattr=on $TESTPOOL/$TESTFS2
 
diff --git a/tests/zfs-tests/tests/functional/rsend/send_realloc_dnode_size.ksh b/tests/zfs-tests/tests/functional/rsend/send_realloc_dnode_size.ksh
index 551ed15db2..bd30488eaa 100755
--- a/tests/zfs-tests/tests/functional/rsend/send_realloc_dnode_size.ksh
+++ b/tests/zfs-tests/tests/functional/rsend/send_realloc_dnode_size.ksh
@@ -88,7 +88,7 @@ log_must zfs snapshot $POOL/fs@c
 # 4. Create an empty file and add xattrs to it to exercise reclaiming a
 #    dnode that requires more than 1 slot for its bonus buffer (Zol #7433)
 log_must zfs set compression=on xattr=sa $POOL/fs
-log_must eval "python -c 'print \"a\" * 512' |
+log_must eval "python3 -c 'print \"a\" * 512' |
     set_xattr_stdin bigval /$POOL/fs/attrs"
 log_must zfs snapshot $POOL/fs@d