diff options
| author | Steven Whitehouse <swhiteho@redhat.com> | 2007-03-18 17:04:15 +0000 |
|---|---|---|
| committer | Steven Whitehouse <swhiteho@redhat.com> | 2007-05-01 09:10:47 +0100 |
| commit | f35ac346bc48b2086aa94f031baf1f6237a89de6 (patch) | |
| tree | 52894d686dfff82914655e3fd32767f806b77d33 /fs | |
| parent | 254da030dfb1b13d42d07e4292a4790d88c6874f (diff) | |
| download | linux-stable-f35ac346bc48b2086aa94f031baf1f6237a89de6.tar.gz linux-stable-f35ac346bc48b2086aa94f031baf1f6237a89de6.tar.bz2 linux-stable-f35ac346bc48b2086aa94f031baf1f6237a89de6.zip | |
[GFS2] Speed up lock_dlm's locking (move sprintf)
The following patch speeds up lock_dlm's locking by moving the sprintf
out from the lock acquisition path and into the lock creation path. This
reduces the amount of CPU time used in acquiring locks by a fair amount.
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
Acked-by: David Teigland <teigland@redhat.com>
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/gfs2/locking/dlm/lock.c | 10 | ||||
| -rw-r--r-- | fs/gfs2/locking/dlm/lock_dlm.h | 1 |
2 files changed, 5 insertions, 6 deletions
diff --git a/fs/gfs2/locking/dlm/lock.c b/fs/gfs2/locking/dlm/lock.c index b167addf9fd1..f9c8bda289a8 100644 --- a/fs/gfs2/locking/dlm/lock.c +++ b/fs/gfs2/locking/dlm/lock.c @@ -151,7 +151,7 @@ static inline unsigned int make_flags(struct gdlm_lock *lp, /* make_strname - convert GFS lock numbers to a string */ -static inline void make_strname(struct lm_lockname *lockname, +static inline void make_strname(const struct lm_lockname *lockname, struct gdlm_strname *str) { sprintf(str->name, "%8x%16llx", lockname->ln_type, @@ -169,6 +169,7 @@ static int gdlm_create_lp(struct gdlm_ls *ls, struct lm_lockname *name, return -ENOMEM; lp->lockname = *name; + make_strname(name, &lp->strname); lp->ls = ls; lp->cur = DLM_LOCK_IV; lp->lvb = NULL; @@ -227,7 +228,6 @@ void gdlm_put_lock(void *lock) unsigned int gdlm_do_lock(struct gdlm_lock *lp) { struct gdlm_ls *ls = lp->ls; - struct gdlm_strname str; int error, bast = 1; /* @@ -249,8 +249,6 @@ unsigned int gdlm_do_lock(struct gdlm_lock *lp) if (test_bit(LFL_NOBAST, &lp->flags)) bast = 0; - make_strname(&lp->lockname, &str); - set_bit(LFL_ACTIVE, &lp->flags); log_debug("lk %x,%llx id %x %d,%d %x", lp->lockname.ln_type, @@ -258,8 +256,8 @@ unsigned int gdlm_do_lock(struct gdlm_lock *lp) lp->cur, lp->req, lp->lkf); error = dlm_lock(ls->dlm_lockspace, lp->req, &lp->lksb, lp->lkf, - str.name, str.namelen, 0, gdlm_ast, lp, - bast ? gdlm_bast : NULL); + lp->strname.name, lp->strname.namelen, 0, gdlm_ast, + lp, bast ? gdlm_bast : NULL); if ((error == -EAGAIN) && (lp->lkf & DLM_LKF_NOQUEUE)) { lp->lksb.sb_status = -EAGAIN; diff --git a/fs/gfs2/locking/dlm/lock_dlm.h b/fs/gfs2/locking/dlm/lock_dlm.h index a87c7bf3c568..6888bd49c31b 100644 --- a/fs/gfs2/locking/dlm/lock_dlm.h +++ b/fs/gfs2/locking/dlm/lock_dlm.h @@ -106,6 +106,7 @@ enum { struct gdlm_lock { struct gdlm_ls *ls; struct lm_lockname lockname; + struct gdlm_strname strname; char *lvb; struct dlm_lksb lksb; |