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| author | delphij <delphij@FreeBSD.org> | 2014-11-02 19:16:41 +0000 |
|---|---|---|
| committer | delphij <delphij@FreeBSD.org> | 2014-11-02 19:16:41 +0000 |
| commit | 9a897ad843a0c5825adf2cb8457f5d5c0d3f3294 (patch) | |
| tree | 1a52b524a4f4ede214789fe32285c1760677cf6f /sys/cddl | |
| parent | 78541e1020318c8a7b38275b4375f6246eeec45c (diff) | |
| download | FreeBSD-src-9a897ad843a0c5825adf2cb8457f5d5c0d3f3294.zip FreeBSD-src-9a897ad843a0c5825adf2cb8457f5d5c0d3f3294.tar.gz | |
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>
Diffstat (limited to 'sys/cddl')
| -rw-r--r-- | sys/cddl/contrib/opensolaris/uts/common/fs/zfs/arc.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/arc.c b/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/arc.c index 4503a25..a160c6e 100644 --- a/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/arc.c +++ b/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/arc.c @@ -220,6 +220,7 @@ TUNABLE_QUAD("vfs.zfs.arc_max", &zfs_arc_max); 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, CTLFLAG_RDTUN, &zfs_arc_min, 0, 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. |
