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authorDavid Teigland <teigland@redhat.com>2012-11-14 13:46:53 -0500
committerSteven Whitehouse <swhiteho@redhat.com>2012-11-15 10:16:59 +0000
commitdba2d70c5dc520fdb569d1fd8dbd45c0e330253e (patch)
tree35cee899f98a6d863d48ecc2dc891b9dbb38b27e /fs/gfs2/lock_dlm.c
parentfb6791d100d1bba20b5cdbc4912e1f7086ec60f8 (diff)
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.c12
1 files changed, 7 insertions, 5 deletions
diff --git a/fs/gfs2/lock_dlm.c b/fs/gfs2/lock_dlm.c
index f6504d3fadb..d28ae37ceb3 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;
}