OpenZFS on Linux and FreeBSD
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chrisrd 338523dd6e Fix free memory calculation on v3.14+
Provide infrastructure to auto-configure to enum and API changes in the
global page stats used for our free memory calculations.

arc_free_memory has been broken since an API change in Linux v3.14:

2016-07-28 v4.8 599d0c95 mm, vmscan: move LRU lists to node
2016-07-28 v4.8 75ef7184 mm, vmstat: add infrastructure for per-node
  vmstats

These commits moved some of global_page_state() into
global_node_page_state(). The API change was particularly egregious as,
instead of breaking the old code, it silently did the wrong thing and we
continued using global_page_state() where we should have been using
global_node_page_state(), thus indexing into the wrong array via
NR_SLAB_RECLAIMABLE et al.

There have been further API changes along the way:

2017-07-06 v4.13 385386cf mm: vmstat: move slab statistics from zone to
  node counters
2017-09-06 v4.14 c41f012a mm: rename global_page_state to
  global_zone_page_state

...and various (incomplete, as it turns out) attempts to accomodate
these changes in ZoL:

2017-08-24 2209e409 Linux 4.8+ compatibility fix for vm stats
2017-09-16 787acae0 Linux 3.14 compat: IO acct, global_page_state, etc
2017-09-19 661907e6 Linux 4.14 compat: IO acct, global_page_state, etc

The config infrastructure provided here resolves these issues going back
to the original API change in v3.14 and is robust against further Linux
changes in this area.

Reviewed-by: Giuseppe Di Natale <dinatale2@llnl.gov>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: George Melikov <mail@gmelikov.ru>
Signed-off-by: Chris Dunlop <chris@onthe.net.au>
Closes #7170
2018-03-14 16:10:37 -07:00
.github Update codecov.yml 2018-03-14 16:10:36 -07:00
cmd Add SMART attributes for SSD and NVMe 2018-03-14 16:10:37 -07:00
config Fix free memory calculation on v3.14+ 2018-03-14 16:10:37 -07:00
contrib contrib/initramfs: add missing conf.d/zfs 2018-03-14 16:10:37 -07:00
etc Allow modprobe to fail when called within systemd 2018-03-14 16:10:37 -07:00
include Fix free memory calculation on v3.14+ 2018-03-14 16:10:37 -07:00
lib 'zfs receive' fails with "dataset is busy" 2018-03-14 16:10:37 -07:00
man Clarify zinject(8) explanation of -e 2018-03-14 16:10:37 -07:00
module Fix free memory calculation on v3.14+ 2018-03-14 16:10:37 -07:00
rpm Fix systemd_ RPM macros usage on Debian-based distributions 2018-03-14 16:10:36 -07:00
scripts Fix free memory calculation on v3.14+ 2018-03-14 16:10:37 -07:00
tests Correct count_uberblocks in mmp.kshlib 2018-03-14 16:10:37 -07:00
udev Fix spelling 2017-01-03 11:31:18 -06:00
.gitignore Add configure option to enable gcov analysis 2018-03-14 16:10:36 -07:00
.gitmodules Add zimport.sh compatibility test script 2014-02-21 12:10:31 -08:00
AUTHORS Add a missing > to AUTHORS 2014-09-02 14:18:53 -07:00
COPYRIGHT Update ZED copyright boilerplate 2015-05-11 15:07:00 -07:00
DISCLAIMER Fix minor typos and update marketing copy. 2013-03-21 12:51:06 -07:00
META Tag zfs-0.7.6 2018-02-01 10:02:58 -08:00
Makefile.am Add support for "--enable-code-coverage" option 2018-03-14 16:10:36 -07:00
OPENSOLARIS.LICENSE Add CDDL license file 2008-12-01 14:49:34 -08:00
README.markdown Update codecov.yml 2018-03-14 16:10:36 -07:00
TEST Retire filebench testing 2017-06-01 06:24:28 -07:00
autogen.sh build: do not call boilerplate ourself 2013-04-02 10:55:20 -07:00
configure.ac Add support for "--enable-code-coverage" option 2018-03-14 16:10:36 -07:00
copy-builtin Allow c99 when building ZFS in the kernel tree 2017-03-27 12:31:15 -07:00
zfs-script-config.sh.in zpool iostat/status -c improvements 2017-06-05 10:52:15 -07:00
zfs.release.in Move zfs.release generation to configure step 2012-07-12 12:22:51 -07:00

README.markdown

img

ZFS on Linux is an advanced file system and volume manager which was originally developed for Solaris and is now maintained by the OpenZFS community.

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Official Resources

Installation

Full documentation for installing ZoL on your favorite Linux distribution can be found at our site.

Contribute & Develop

We have a separate document with contribution guidelines.