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path: root/fs/ocfs2/dlm/dlmthread.c
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Diffstat (limited to 'fs/ocfs2/dlm/dlmthread.c')
-rw-r--r--fs/ocfs2/dlm/dlmthread.c37
1 files changed, 35 insertions, 2 deletions
diff --git a/fs/ocfs2/dlm/dlmthread.c b/fs/ocfs2/dlm/dlmthread.c
index 71302b90daf..76526ea95bb 100644
--- a/fs/ocfs2/dlm/dlmthread.c
+++ b/fs/ocfs2/dlm/dlmthread.c
@@ -54,6 +54,8 @@
#include "cluster/masklog.h"
static int dlm_thread(void *data);
+static void dlm_purge_lockres_now(struct dlm_ctxt *dlm,
+ struct dlm_lock_resource *lockres);
static void dlm_flush_asts(struct dlm_ctxt *dlm);
@@ -111,10 +113,23 @@ void __dlm_lockres_calc_usage(struct dlm_ctxt *dlm,
res->last_used = jiffies;
list_add_tail(&res->purge, &dlm->purge_list);
dlm->purge_count++;
+
+ /* if this node is not the owner, there is
+ * no way to keep track of who the owner could be.
+ * unhash it to avoid serious problems. */
+ if (res->owner != dlm->node_num) {
+ mlog(0, "%s:%.*s: doing immediate "
+ "purge of lockres owned by %u\n",
+ dlm->name, res->lockname.len,
+ res->lockname.name, res->owner);
+
+ dlm_purge_lockres_now(dlm, res);
+ }
}
} else if (!list_empty(&res->purge)) {
- mlog(0, "removing lockres %.*s from purge list\n",
- res->lockname.len, res->lockname.name);
+ mlog(0, "removing lockres %.*s from purge list, "
+ "owner=%u\n", res->lockname.len, res->lockname.name,
+ res->owner);
list_del_init(&res->purge);
dlm->purge_count--;
@@ -180,6 +195,24 @@ finish:
__dlm_unhash_lockres(lockres);
}
+/* make an unused lockres go away immediately.
+ * as soon as the dlm spinlock is dropped, this lockres
+ * will not be found. kfree still happens on last put. */
+static void dlm_purge_lockres_now(struct dlm_ctxt *dlm,
+ struct dlm_lock_resource *lockres)
+{
+ assert_spin_locked(&dlm->spinlock);
+ assert_spin_locked(&lockres->spinlock);
+
+ BUG_ON(!__dlm_lockres_unused(lockres));
+
+ if (!list_empty(&lockres->purge)) {
+ list_del_init(&lockres->purge);
+ dlm->purge_count--;
+ }
+ __dlm_unhash_lockres(lockres);
+}
+
static void dlm_run_purge_list(struct dlm_ctxt *dlm,
int purge_now)
{