svn commit: r332365 - head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs

[Mark Johnston]

Author: markj
Date: Tue Apr 10 13:56:06 2018
New Revision: 332365
URL: https://svnweb.freebsd.org/changeset/base/332365

Log:
  Set zfs_arc_free_target to v_free_target.
  
  Page daemon output is now regulated by a PID controller with a setpoint
  of v_free_target. Moreover, the page daemon now wakes up regularly
  rather than waiting for a wakeup from another thread. This means that
  the free page count is unlikely to drop below the old
  zfs_arc_free_target value, and as a result the ARC was not readily
  freeing pages under memory pressure. Address the immediate problem by
  updating zfs_arc_free_target to match the page daemon's new behaviour.
  
  Reported and tested by:	truckman
  Discussed with:	jeff
  X-MFC with:	r329882
  Differential Revision:	https://reviews.freebsd.org/D14994

Modified:
  head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/arc.c

Modified: head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/arc.c
==============================================================================
--- head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/arc.c	Tue Apr 10 13:47:09 2018	(r332364)
+++ head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/arc.c	Tue Apr 10 13:56:06 2018	(r332365)
@@ -389,7 +389,7 @@ static void
 arc_free_target_init(void *unused __unused)
 {
 
-	zfs_arc_free_target = (vm_cnt.v_free_min / 10) * 11;
+	zfs_arc_free_target = vm_cnt.v_free_target;
 }
 SYSINIT(arc_free_target_init, SI_SUB_KTHREAD_PAGE, SI_ORDER_ANY,
     arc_free_target_init, NULL);