Date: Sun, 2 Nov 2014 19:16:42 +0000 (UTC) From: Xin LI <delphij@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-10@freebsd.org Subject: svn commit: r273984 - stable/10/sys/cddl/contrib/opensolaris/uts/common/fs/zfs Message-ID: <201411021916.sA2JGgjW082430@svn.freebsd.org>
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Author: delphij Date: Sun Nov 2 19:16:41 2014 New Revision: 273984 URL: https://svnweb.freebsd.org/changeset/base/273984 Log: MFC r273026: Add a tunable for arc_shrink_shift (vfs.zfs.arc_shrink_shift) that controls how much fraction, 1/2^arc_shrink_shift, should be reclaimed when there is memory pressure. Submitted by: Richard Kojedzinszky <krichy at tvnetwork.hu> 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 Sun Nov 2 19:09:34 2014 (r273983) +++ stable/10/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/arc.c Sun Nov 2 19:16:41 2014 (r273984) @@ -220,6 +220,7 @@ TUNABLE_QUAD("vfs.zfs.arc_max", &zfs_arc TUNABLE_QUAD("vfs.zfs.arc_min", &zfs_arc_min); TUNABLE_QUAD("vfs.zfs.arc_meta_limit", &zfs_arc_meta_limit); TUNABLE_QUAD("vfs.zfs.arc_average_blocksize", &zfs_arc_average_blocksize); +TUNABLE_INT("vfs.zfs.arc_shrink_shift", &zfs_arc_shrink_shift); SYSCTL_DECL(_vfs_zfs); SYSCTL_UQUAD(_vfs_zfs, OID_AUTO, arc_max, CTLFLAG_RDTUN, &zfs_arc_max, 0, "Maximum ARC size"); @@ -228,6 +229,10 @@ SYSCTL_UQUAD(_vfs_zfs, OID_AUTO, arc_min SYSCTL_UQUAD(_vfs_zfs, OID_AUTO, arc_average_blocksize, CTLFLAG_RDTUN, &zfs_arc_average_blocksize, 0, "ARC average blocksize"); +SYSCTL_INT(_vfs_zfs, OID_AUTO, arc_shrink_shift, CTLFLAG_RW, + &arc_shrink_shift, 0, + "log2(fraction of arc to reclaim)"); + /* * We don't have a tunable for arc_free_target due to the dependency on * pagedaemon initialisation.
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