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| author | Bob Peterson <rpeterso@redhat.com> | 2011-06-15 11:41:48 -0400 |
|---|---|---|
| committer | Steven Whitehouse <swhiteho@redhat.com> | 2011-07-15 09:32:11 +0100 |
| commit | 7cf8dcd3b68a760d66fbc7f0d75d3fbb8f21775d (patch) | |
| tree | f529dace79c044e6128e9cf283a5c1a584fed5db /fs/gfs2/glock.h | |
| parent | 17d539f0499fa2c0321b7c260831cca2bb36d119 (diff) | |
| download | blackbird-op-linux-7cf8dcd3b68a760d66fbc7f0d75d3fbb8f21775d.tar.gz blackbird-op-linux-7cf8dcd3b68a760d66fbc7f0d75d3fbb8f21775d.zip | |
GFS2: Automatically adjust glock min hold time
This patch is a performance improvement for GFS2 in a clustered
environment. It makes the glock hold time self-adjusting.
Signed-off-by: Bob Peterson <rpeterso@redhat.com>
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
Diffstat (limited to 'fs/gfs2/glock.h')
| -rw-r--r-- | fs/gfs2/glock.h | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/fs/gfs2/glock.h b/fs/gfs2/glock.h index 6b2f757b9281..66707118af25 100644 --- a/fs/gfs2/glock.h +++ b/fs/gfs2/glock.h @@ -113,6 +113,12 @@ enum { #define GLR_TRYFAILED 13 +#define GL_GLOCK_MAX_HOLD (long)(HZ / 5) +#define GL_GLOCK_DFT_HOLD (long)(HZ / 5) +#define GL_GLOCK_MIN_HOLD (long)(10) +#define GL_GLOCK_HOLD_INCR (long)(HZ / 20) +#define GL_GLOCK_HOLD_DECR (long)(HZ / 40) + struct lm_lockops { const char *lm_proto_name; int (*lm_mount) (struct gfs2_sbd *sdp, const char *fsname); |
