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| author |   Mark Fasheh <mark.fasheh@oracle.com> | 2006-03-09 17:55:56 -0800 |
|---|---|---|
| committer | Mark Fasheh <mark.fasheh@oracle.com> | 2006-06-26 14:42:39 -0700 |
| commit | a3d3329159ea76bae0b3b8680691a1c3ecf5801f (patch) | |
| tree | a4521103c45190ff340f918d131649a20b414b27 /fs/ocfs2/dlm/dlmdomain.c | |
| parent | ocfs2: move lockres qstr next to hlist_node structure (diff) | |
| download | linux-dev-a3d3329159ea76bae0b3b8680691a1c3ecf5801f.tar.xz linux-dev-a3d3329159ea76bae0b3b8680691a1c3ecf5801f.zip | |
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>
Diffstat (limited to '')
| -rw-r--r-- | fs/ocfs2/dlm/dlmdomain.c | 12 |
1 files changed, 5 insertions, 7 deletions
diff --git a/fs/ocfs2/dlm/dlmdomain.c b/fs/ocfs2/dlm/dlmdomain.c index 8f3a9e3106fd..a818fde24476 100644 --- a/fs/ocfs2/dlm/dlmdomain.c +++ b/fs/ocfs2/dlm/dlmdomain.c @@ -90,7 +90,6 @@ void __dlm_insert_lockres(struct dlm_ctxt *dlm, assert_spin_locked(&dlm->spinlock); q = &res->lockname; - q->hash = full_name_hash(q->name, q->len); bucket = &(dlm->lockres_hash[q->hash % DLM_HASH_BUCKETS]); /* get a reference for our hashtable */ @@ -100,10 +99,10 @@ void __dlm_insert_lockres(struct dlm_ctxt *dlm, } struct dlm_lock_resource * __dlm_lookup_lockres(struct dlm_ctxt *dlm, - const char *name, - unsigned int len) + const char *name, + unsigned int len, + unsigned int hash) { - unsigned int hash; struct hlist_node *iter; struct dlm_lock_resource *tmpres=NULL; struct hlist_head *bucket; @@ -112,8 +111,6 @@ struct dlm_lock_resource * __dlm_lookup_lockres(struct dlm_ctxt *dlm, assert_spin_locked(&dlm->spinlock); - hash = full_name_hash(name, len); - bucket = &(dlm->lockres_hash[hash % DLM_HASH_BUCKETS]); /* check for pre-existing lock */ @@ -135,9 +132,10 @@ struct dlm_lock_resource * dlm_lookup_lockres(struct dlm_ctxt *dlm, unsigned int len) { struct dlm_lock_resource *res; + unsigned int hash = dlm_lockid_hash(name, len); spin_lock(&dlm->spinlock); - res = __dlm_lookup_lockres(dlm, name, len); + res = __dlm_lookup_lockres(dlm, name, len, hash); spin_unlock(&dlm->spinlock); return res; } |