dlm: use kref_put_lock in put_rsb

This patch will optimize put_rsb() by using kref_put_lock(). The
function kref_put_lock() will only take the lock if the reference is
going to be zero, if not the lock will never be held.

Signed-off-by: Alexander Aring <aahringo@redhat.com>
Signed-off-by: David Teigland <teigland@redhat.com>
This commit is contained in:
Alexander Aring 2022-05-02 11:14:09 -04:00 коммит произвёл David Teigland
Родитель 0ccc106052
Коммит 9502a7f688
1 изменённых файлов: 5 добавлений и 3 удалений

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@ -350,10 +350,12 @@ static void put_rsb(struct dlm_rsb *r)
{ {
struct dlm_ls *ls = r->res_ls; struct dlm_ls *ls = r->res_ls;
uint32_t bucket = r->res_bucket; uint32_t bucket = r->res_bucket;
int rv;
spin_lock(&ls->ls_rsbtbl[bucket].lock); rv = kref_put_lock(&r->res_ref, toss_rsb,
kref_put(&r->res_ref, toss_rsb); &ls->ls_rsbtbl[bucket].lock);
spin_unlock(&ls->ls_rsbtbl[bucket].lock); if (rv)
spin_unlock(&ls->ls_rsbtbl[bucket].lock);
} }
void dlm_put_rsb(struct dlm_rsb *r) void dlm_put_rsb(struct dlm_rsb *r)