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GFS2: Don't use a try lock when promoting to a higher mode 

Previously we marked all locks being promoted to a higher mode
with the try flag to avoid any potential deadlocks issues. The
DLM is able to detect these and report them in way that GFS2 can
deal with them correctly. So we can just request the required mode
and wait for a response without needing to perform this check.

Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
This commit is contained in:
Steven Whitehouse 2011-05-05 12:36:38 +01:00
parent d192a8e5c6
commit 588da3b3be
1 changed files with 0 additions and 5 deletions
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5
fs/gfs2/glock.c
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@ -543,11 +543,6 @@ __acquires(&gl->gl_spin)
clear_bit(GLF_INVALIDATE_IN_PROGRESS, &gl->gl_flags);
gfs2_glock_hold(gl);
if (target != LM_ST_UNLOCKED && (gl->gl_state == LM_ST_SHARED ||
gl->gl_state == LM_ST_DEFERRED) &&
!(lck_flags & (LM_FLAG_TRY | LM_FLAG_TRY_1CB)))
lck_flags |= LM_FLAG_TRY_1CB;
if (sdp->sd_lockstruct.ls_ops->lm_lock) {
/* lock_dlm */
ret = sdp->sd_lockstruct.ls_ops->lm_lock(gl, target, lck_flags);