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, 5 insertions, 1 deletions

diff --git a/fs/ocfs2/dlm/dlmcommon.h b/fs/ocfs2/dlm/dlmcommon.h
index 1c05d485e019..3b675368762e 100644
--- a/fs/ocfs2/dlm/dlmcommon.h
+++ b/fs/ocfs2/dlm/dlmcommon.h
@@ -39,6 +39,9 @@
 
 #define DLM_HASH_BUCKETS     (PAGE_SIZE / sizeof(struct hlist_head))
 
+/* Intended to make it easier for us to switch out hash functions */
+#define dlm_lockid_hash(_n, _l) full_name_hash(_n, _l)
+
 enum dlm_ast_type {
         DLM_AST = 0,
         DLM_BAST,
@@ -694,7 +697,8 @@ void __dlm_insert_lockres(struct dlm_ctxt *dlm,
                           struct dlm_lock_resource *res);
 struct dlm_lock_resource * __dlm_lookup_lockres(struct dlm_ctxt *dlm,
                                                 const char *name,
-                                                unsigned int len);
+                                                unsigned int len,
+                                                unsigned int hash);
 struct dlm_lock_resource * dlm_lookup_lockres(struct dlm_ctxt *dlm,
                                               const char *name,
                                               unsigned int len);