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| author | David Teigland <teigland@redhat.com> | 2012-11-14 13:46:53 -0500 |
|---|---|---|
| committer | Steven Whitehouse <swhiteho@redhat.com> | 2012-11-15 10:16:59 +0000 |
| commit | dba2d70c5dc520fdb569d1fd8dbd45c0e330253e (patch) | |
| tree | 35cee899f98a6d863d48ecc2dc891b9dbb38b27e /fs/gfs2/lock_dlm.c | |
| parent | fb6791d100d1bba20b5cdbc4912e1f7086ec60f8 (diff) | |
| download | blackbird-op-linux-dba2d70c5dc520fdb569d1fd8dbd45c0e330253e.tar.gz blackbird-op-linux-dba2d70c5dc520fdb569d1fd8dbd45c0e330253e.zip | |
GFS2: only use lvb on glocks that need it
Save the effort of allocating, reading and writing
the lvb for most glocks that do not use it.
Signed-off-by: David Teigland <teigland@redhat.com>
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
Diffstat (limited to 'fs/gfs2/lock_dlm.c')
| -rw-r--r-- | fs/gfs2/lock_dlm.c | 12 |
1 files changed, 7 insertions, 5 deletions
diff --git a/fs/gfs2/lock_dlm.c b/fs/gfs2/lock_dlm.c index f6504d3fadb3..d28ae37ceb3c 100644 --- a/fs/gfs2/lock_dlm.c +++ b/fs/gfs2/lock_dlm.c @@ -120,7 +120,7 @@ static void gdlm_ast(void *arg) gfs2_update_reply_times(gl); BUG_ON(gl->gl_lksb.sb_flags & DLM_SBF_DEMOTED); - if (gl->gl_lksb.sb_flags & DLM_SBF_VALNOTVALID) + if (gl->gl_lksb.sb_flags & DLM_SBF_VALNOTVALID && gl->gl_lvb) memset(gl->gl_lvb, 0, GDLM_LVB_SIZE); switch (gl->gl_lksb.sb_status) { @@ -203,8 +203,10 @@ static int make_mode(const unsigned int lmstate) static u32 make_flags(struct gfs2_glock *gl, const unsigned int gfs_flags, const int req) { - u32 lkf = DLM_LKF_VALBLK; - u32 lkid = gl->gl_lksb.sb_lkid; + u32 lkf = 0; + + if (gl->gl_lvb) + lkf |= DLM_LKF_VALBLK; if (gfs_flags & LM_FLAG_TRY) lkf |= DLM_LKF_NOQUEUE; @@ -228,7 +230,7 @@ static u32 make_flags(struct gfs2_glock *gl, const unsigned int gfs_flags, BUG(); } - if (lkid != 0) { + if (gl->gl_lksb.sb_lkid != 0) { lkf |= DLM_LKF_CONVERT; if (test_bit(GLF_BLOCKING, &gl->gl_flags)) lkf |= DLM_LKF_QUECVT; @@ -292,7 +294,7 @@ static void gdlm_put_lock(struct gfs2_glock *gl) /* don't want to skip dlm_unlock writing the lvb when lock is ex */ if (test_bit(SDF_SKIP_DLM_UNLOCK, &sdp->sd_flags) && - gl->gl_state != LM_ST_EXCLUSIVE) { + gl->gl_lvb && gl->gl_state != LM_ST_EXCLUSIVE) { gfs2_glock_free(gl); return; } |
