From: Rich Ercolani <Rincebrain@gmail.com>
Date: Wed, 5 Sep 2018 05:15:14 +0000 (-0400)
Subject: Added recalculation of ARC stats mid-eviction
X-Git-Tag: zfs-0.8.0-rc1~6
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=0405eeea6a8d142171ce352d3dac5f08cd6f70f0;p=zfs

Added recalculation of ARC stats mid-eviction

Re-adds a recalculation step for the ARC stats after the MRU
eviction so that we don't pathologically attempt to evict the MFU.

Reviewed-by: Richard Elling <Richard.Elling@RichardElling.com>
Reviewed-by: George Melikov <mail@gmelikov.ru>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Authored-by: Mark Johnston <markj@freebsd.org>
Signed-off-by: Rich Ercolani <rincebrain@gmail.com>
Closes #7855
---

diff --git a/module/zfs/arc.c b/module/zfs/arc.c
index 727b21f3f..5e53f9879 100644
--- a/module/zfs/arc.c
+++ b/module/zfs/arc.c
@@ -4638,6 +4638,13 @@ arc_adjust(void)
 		    arc_adjust_impl(arc_mru, 0, target, ARC_BUFC_METADATA);
 	}
 
+	/*
+	 * Re-sum ARC stats after the first round of evictions.
+	 */
+	asize = aggsum_value(&arc_size);
+	ameta = aggsum_value(&arc_meta_used);
+
+
 	/*
 	 * Adjust MFU size
 	 *