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Avoid unnecessary unlock attempts with LCK_CACHE pseudo-locks.

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This commit is contained in:
Alasdair Kergon 2008-05-08 18:35:58 +00:00
parent 3835ad6b1c
commit 1a20d53171
2 changed files with 7 additions and 2 deletions
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1
WHATS_NEW
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@ -5,6 +5,7 @@ Version 2.02.38 -
Version 2.02.37 -
=================================
Avoid unnecessary unlock attempts with LCK_CACHE pseudo-locks.
When asked to drop cached committed VG metadata, invalidate cached PV labels.
Drop metadata cache before writing precommitted metadata instead of after.
Don't touch /dev in vgrename if activation is disabled.

8
lib/locking/locking.c
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@ -370,8 +370,12 @@ int lock_vol(struct cmd_context *cmd, const char *vol, uint32_t flags)
if (!_lock_vol(cmd, resource, flags))
return 0;
/* Perform immediate unlock unless LCK_HOLD set */
if (!(flags & LCK_HOLD) && ((flags & LCK_TYPE_MASK) != LCK_UNLOCK)) {
/*
* If a real lock was acquired (i.e. not LCK_CACHE),
* perform an immediate unlock unless LCK_HOLD was requested.
*/
if (!(flags & LCK_CACHE) && !(flags & LCK_HOLD) &&
((flags & LCK_TYPE_MASK) != LCK_UNLOCK)) {
if (!_lock_vol(cmd, resource,
(flags & ~LCK_TYPE_MASK) | LCK_UNLOCK))
return 0;