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| author | Mark Fasheh <mark.fasheh@oracle.com> | 2007-10-05 12:09:05 -0700 |
|---|---|---|
| committer | Mark Fasheh <mark.fasheh@oracle.com> | 2007-11-06 15:31:45 -0800 |
| commit | 019d1b2247c6898589560c6f3b3e7ec280b0010a (patch) | |
| tree | 869d6e1fef42e7d7a4c0f81a3b6ddf19ea972792 /fs/ocfs2 | |
| parent | 3cf0c507dd28de0e1a4c24304d806e6b3976f0f5 (diff) | |
| download | lwn-019d1b2247c6898589560c6f3b3e7ec280b0010a.tar.gz lwn-019d1b2247c6898589560c6f3b3e7ec280b0010a.zip | |
ocfs2: Create locks at initially requested level
If we have not yet created a cluster lock, ocfs2_cluster_lock() will
first create it at NLMODE, and then convert the lock to either PRMODE or
EXMODE (whichever is requested).
Change ocfs2_cluster_lock() to just create the lock at the initially
requested level. ocfs2_locking_ast() handles this case fine, so the only
update required was in setup of locking state. This should reduce the number
of network messages required for a new lock by one, providing an incremental
performance enhancement.
Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>
Diffstat (limited to 'fs/ocfs2')
| -rw-r--r-- | fs/ocfs2/dlmglue.c | 23 |
1 files changed, 9 insertions, 14 deletions
diff --git a/fs/ocfs2/dlmglue.c b/fs/ocfs2/dlmglue.c index ef09fd20f3a5..4e97dcceaf8f 100644 --- a/fs/ocfs2/dlmglue.c +++ b/fs/ocfs2/dlmglue.c @@ -980,18 +980,6 @@ again: goto unlock; } - if (!(lockres->l_flags & OCFS2_LOCK_ATTACHED)) { - /* lock has not been created yet. */ - spin_unlock_irqrestore(&lockres->l_lock, flags); - - ret = ocfs2_lock_create(osb, lockres, LKM_NLMODE, 0); - if (ret < 0) { - mlog_errno(ret); - goto out; - } - goto again; - } - if (lockres->l_flags & OCFS2_LOCK_BLOCKED && !ocfs2_may_continue_on_blocked_lock(lockres, level)) { /* is the lock is currently blocked on behalf of @@ -1006,7 +994,14 @@ again: mlog(ML_ERROR, "lockres %s has action %u pending\n", lockres->l_name, lockres->l_action); - lockres->l_action = OCFS2_AST_CONVERT; + if (!(lockres->l_flags & OCFS2_LOCK_ATTACHED)) { + lockres->l_action = OCFS2_AST_ATTACH; + lkm_flags &= ~LKM_CONVERT; + } else { + lockres->l_action = OCFS2_AST_CONVERT; + lkm_flags |= LKM_CONVERT; + } + lockres->l_requested = level; lockres_or_flags(lockres, OCFS2_LOCK_BUSY); spin_unlock_irqrestore(&lockres->l_lock, flags); @@ -1021,7 +1016,7 @@ again: status = dlmlock(osb->dlm, level, &lockres->l_lksb, - lkm_flags|LKM_CONVERT, + lkm_flags, lockres->l_name, OCFS2_LOCK_ID_MAX_LEN - 1, ocfs2_locking_ast, |