From c52fca13a08f6a5c1f14a44d6f3707a48a27a1d0 Mon Sep 17 00:00:00 2001
From: Matthew Ahrens <mahrens@delphix.com>
Date: Wed, 24 Jun 2015 15:49:08 -0700
Subject: [PATCH] Illumos 5368 - ARC should cache more metadata

5368 ARC should cache more metadata
Reviewed by: Alex Reece <alex.reece@delphix.com>
Reviewed by: Christopher Siden <christopher.siden@delphix.com>
Reviewed by: George Wilson <george.wilson@delphix.com>
Reviewed by: Richard Elling <richard.elling@richardelling.com>
Approved by: Dan McDonald <danmcd@omniti.com>

References:
  https://www.illumos.org/issues/5368
  https://github.com/illumos/illumos-gate/commit/3a5286a

Porting Notes:

The vast majority of this patch was already merged in the context
of the 06358ea changes.  This is just a small hunk which was missed.

Ported-by: Brian Behlendorf <behlendorf1@llnl.gov>
---
 module/zfs/arc.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/module/zfs/arc.c b/module/zfs/arc.c
index 9bf5272037..1a4cdb4413 100644
--- a/module/zfs/arc.c
+++ b/module/zfs/arc.c
@@ -4928,6 +4928,12 @@ arc_init(void)
 	if (zfs_arc_meta_limit > 0 && zfs_arc_meta_limit <= arc_c_max)
 		arc_meta_limit = zfs_arc_meta_limit;
 
+	if (zfs_arc_meta_min > 0) {
+		arc_meta_min = zfs_arc_meta_min;
+	} else {
+		arc_meta_min = arc_c_min / 2;
+	}
+
 	if (zfs_arc_num_sublists_per_state < 1)
 		zfs_arc_num_sublists_per_state = num_online_cpus();