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| author | delphij <delphij@FreeBSD.org> | 2014-10-18 22:11:10 +0000 |
|---|---|---|
| committer | delphij <delphij@FreeBSD.org> | 2014-10-18 22:11:10 +0000 |
| commit | 5165eb29732afe97f688263f6b85d672c8c00f12 (patch) | |
| tree | 9d716432daa957d906d2e1bd86afc8ed24364edb /sys/cddl | |
| parent | 9b44fe556be01b7365289ce03c873448f9158644 (diff) | |
| download | FreeBSD-src-5165eb29732afe97f688263f6b85d672c8c00f12.zip FreeBSD-src-5165eb29732afe97f688263f6b85d672c8c00f12.tar.gz | |
Add tunable vfs.zfs.space_map_blksz for space map's maximum block size.
MFC after: 2 weeks
Diffstat (limited to 'sys/cddl')
| -rw-r--r-- | sys/cddl/contrib/opensolaris/uts/common/fs/zfs/space_map.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/space_map.c b/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/space_map.c index 94790b9..aeac124 100644 --- a/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/space_map.c +++ b/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/space_map.c @@ -37,6 +37,8 @@ #include <sys/refcount.h> #include <sys/zfeature.h> +SYSCTL_DECL(_vfs_zfs); + /* * The data for a given space map can be kept on blocks of any size. * Larger blocks entail fewer i/o operations, but they also cause the @@ -44,6 +46,8 @@ * when only a few blocks have changed since the last transaction group. */ int space_map_blksz = (1 << 12); +SYSCTL_INT(_vfs_zfs, OID_AUTO, space_map_blksz, CTLFLAG_RDTUN, &space_map_blksz, 0, + "Maximum block size for space map. Must be power of 2 and greater than 4096."); /* * Load the space map disk into the specified range tree. Segments of maptype |
