iv/linux
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

ocfs2: Create locks at initially requested level

Browse Source 
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>
This commit is contained in:
Mark Fasheh 2007-10-05 12:09:05 -07:00
parent 3cf0c507dd
commit 019d1b2247
1 changed files with 9 additions and 14 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

23
fs/ocfs2/dlmglue.c
View File

@ -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,