svn commit: r274625 - stable/10/sys/cddl/contrib/opensolaris/uts/common/fs/zfs

[Andriy Gapon]

Author: avg
Date: Mon Nov 17 13:30:18 2014
New Revision: 274625
URL: https://svnweb.freebsd.org/changeset/base/274625

Log:
  MFC r272708: l2arc_write_buffers: reduce headroom value

Modified:
  stable/10/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/arc.c
Directory Properties:
  stable/10/   (props changed)

Modified: stable/10/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/arc.c
==============================================================================
--- stable/10/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/arc.c	Mon Nov 17 13:29:58 2014	(r274624)
+++ stable/10/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/arc.c	Mon Nov 17 13:30:18 2014	(r274625)
@@ -5055,7 +5055,7 @@ l2arc_write_buffers(spa_t *spa, l2arc_de
 		if (ab == NULL)
 			ARCSTAT_BUMP(arcstat_l2_write_buffer_list_null_iter);
 
-		headroom = target_sz * l2arc_headroom;
+		headroom = target_sz * l2arc_headroom * 2 / ARC_BUFC_NUMLISTS;
 		if (do_headroom_boost)
 			headroom = (headroom * l2arc_headroom_boost) / 100;