ocfs2: calculate lockid hash values outside of the spinlock

Fixes a performance bug - pointed out by Andrew.

Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>

1 files changed, 4 insertions, 1 deletions

diff --git a/fs/ocfs2/dlm/dlmrecovery.c b/fs/ocfs2/dlm/dlmrecovery.c
index 9962190e7416..4f3d482a7299 100644
--- a/fs/ocfs2/dlm/dlmrecovery.c
+++ b/fs/ocfs2/dlm/dlmrecovery.c
@@ -1404,6 +1404,7 @@ int dlm_master_requery_handler(struct o2net_msg *msg, u32 len, void *data)
         struct dlm_ctxt *dlm = data;
         struct dlm_master_requery *req = (struct dlm_master_requery *)msg->buf;
         struct dlm_lock_resource *res = NULL;
+        unsigned int hash;
         int master = DLM_LOCK_RES_OWNER_UNKNOWN;
         u32 flags = DLM_ASSERT_MASTER_REQUERY;
 
@@ -1413,8 +1414,10 @@ int dlm_master_requery_handler(struct o2net_msg *msg, u32 len, void *data)
                 return master;
         }
 
+        hash = dlm_lockid_hash(req->name, req->namelen);
+
         spin_lock(&dlm->spinlock);
-        res = __dlm_lookup_lockres(dlm, req->name, req->namelen);
+        res = __dlm_lookup_lockres(dlm, req->name, req->namelen, hash);
         if (res) {
                 spin_lock(&res->spinlock);
                 master = res->owner;