Date: Tue, 10 Apr 2018 13:56:06 +0000 (UTC) From: Mark Johnston <markj@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r332365 - head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs Message-ID: <201804101356.w3ADu6Jr072766@repo.freebsd.org>
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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);
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