From: bobijam <bobijam>
Date: Fri, 10 Apr 2009 01:46:15 +0000 (+0000)
Subject: Branch b1_8
X-Git-Tag: v1_8_0_110~114
X-Git-Url: https://git.whamcloud.com/gitweb?a=commitdiff_plain;h=ab69f3fd9152149ff2a50b4ad2733908dea06682;p=fs%2Flustre-release.git

Branch b1_8
b=18638
i=jinshan.xiong (jay)
i=andrew.perepachko (panda)

ldlm_lock_put() use RCU to call ldlm_lock_free, so need call synchronize_rcu()
to wait a grace period elapsed, so that ldlm_lock_free() get a chance to be
called.
---

diff --git a/lustre/ldlm/ldlm_lockd.c b/lustre/ldlm/ldlm_lockd.c
index 5ed9a1e..28d5823 100644
--- a/lustre/ldlm/ldlm_lockd.c
+++ b/lustre/ldlm/ldlm_lockd.c
@@ -2326,6 +2326,12 @@ void __exit ldlm_exit(void)
                 CERROR("ldlm_refcount is %d in ldlm_exit!\n", ldlm_refcount);
         rc = cfs_mem_cache_destroy(ldlm_resource_slab);
         LASSERTF(rc == 0, "couldn't free ldlm resource slab\n");
+#ifdef __KERNEL__
+        /* ldlm_lock_put() use RCU to call ldlm_lock_free, so need call
+         * synchronize_rcu() to wait a grace period elapsed, so that
+         * ldlm_lock_free() get a chance to be called. */
+        synchronize_rcu();
+#endif
         rc = cfs_mem_cache_destroy(ldlm_lock_slab);
         LASSERTF(rc == 0, "couldn't free ldlm lock slab\n");
         rc = cfs_mem_cache_destroy(ldlm_interval_slab);