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Set zfs_arc_free_target to v_free_target.

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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
This commit is contained in:
Mark Johnston 2018-04-10 13:56:06 +00:00
parent 8593136428
commit b32171ea5a
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=332365
1 changed files with 1 additions and 1 deletions
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2
sys/cddl/contrib/opensolaris/uts/common/fs/zfs/arc.c
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@ -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);