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[PATCH] Clean up ocfs2 hash probe and make it faster

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Signed-Off-By: Daniel Phillips <phillips@google.com>
Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>
This commit is contained in:
Daniel Phillips 2006-03-10 13:31:47 -08:00 committed by Mark Fasheh
parent a3d3329159
commit 4198985f7a
1 changed files with 14 additions and 15 deletions
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29
fs/ocfs2/dlm/dlmdomain.c
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@ -103,28 +103,27 @@ struct dlm_lock_resource * __dlm_lookup_lockres(struct dlm_ctxt *dlm,
unsigned int len,
unsigned int hash)
{
struct hlist_node *iter;
struct dlm_lock_resource *tmpres=NULL;
struct hlist_head *bucket;
struct hlist_node *list;
mlog_entry("%.*s\n", len, name);
assert_spin_locked(&dlm->spinlock);
bucket = &(dlm->lockres_hash[hash % DLM_HASH_BUCKETS]);
/* check for pre-existing lock */
hlist_for_each(iter, bucket) {
tmpres = hlist_entry(iter, struct dlm_lock_resource, hash_node);
if (tmpres->lockname.len == len &&
memcmp(tmpres->lockname.name, name, len) == 0) {
dlm_lockres_get(tmpres);
break;
}
tmpres = NULL;
bucket = dlm->lockres_hash + full_name_hash(name, len) % DLM_HASH_BUCKETS;
hlist_for_each(list, bucket) {
struct dlm_lock_resource *res = hlist_entry(list,
struct dlm_lock_resource, hash_node);
if (res->lockname.name[0] != name[0])
continue;
if (unlikely(res->lockname.len != len))
continue;
if (memcmp(res->lockname.name + 1, name + 1, len - 1))
continue;
dlm_lockres_get(res);
return res;
}
return tmpres;
return NULL;
}
struct dlm_lock_resource * dlm_lookup_lockres(struct dlm_ctxt *dlm,