mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-09-27 12:57:53 +00:00
gfs2: fix glock shrinker ref issues
Before this patch, function gfs2_scan_glock_lru would only try to free glocks that had a reference count of 0. But if the reference count ever got to 0, the glock should have already been freed. Shrinker function gfs2_dispose_glock_lru checks whether glocks on the LRU are demote_ok, and if so, tries to demote them. But that's only possible if the reference count is at least 1. This patch changes gfs2_scan_glock_lru so it will try to demote and/or dispose of glocks that have a reference count of 1 and which are either demotable, or are already unlocked. Signed-off-by: Bob Peterson <rpeterso@redhat.com> Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>
This commit is contained in:
parent
52954b7509
commit
62862485a4
1 changed files with 3 additions and 1 deletions
|
@ -2010,7 +2010,9 @@ static long gfs2_scan_glock_lru(int nr)
|
|||
if (!test_bit(GLF_LOCK, &gl->gl_flags)) {
|
||||
if (!spin_trylock(&gl->gl_lockref.lock))
|
||||
continue;
|
||||
if (!gl->gl_lockref.count) {
|
||||
if (gl->gl_lockref.count <= 1 &&
|
||||
(gl->gl_state == LM_ST_UNLOCKED ||
|
||||
demote_ok(gl))) {
|
||||
list_move(&gl->gl_lru, &dispose);
|
||||
atomic_dec(&lru_count);
|
||||
freed++;
|
||||
|
|
Loading…
Reference in a new issue