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dlm: use kref_put_lock in __put_lkb 

This patch will optimize __put_lkb() 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 11:14:10 -04:00 committed by David Teigland
parent 9502a7f688
commit 8e51ec6146
1 changed files with 6 additions and 6 deletions
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12
fs/dlm/lock.c
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@ -1268,9 +1268,11 @@ static void kill_lkb(struct kref *kref)
static int __put_lkb(struct dlm_ls *ls, struct dlm_lkb *lkb)
{
uint32_t lkid = lkb->lkb_id;
int rv;
spin_lock(&ls->ls_lkbidr_spin);
if (kref_put(&lkb->lkb_ref, kill_lkb)) {
rv = kref_put_lock(&lkb->lkb_ref, kill_lkb,
&ls->ls_lkbidr_spin);
if (rv) {
idr_remove(&ls->ls_lkbidr, lkid);
spin_unlock(&ls->ls_lkbidr_spin);
@ -1280,11 +1282,9 @@ static int __put_lkb(struct dlm_ls *ls, struct dlm_lkb *lkb)
if (lkb->lkb_lvbptr && is_master_copy(lkb))
dlm_free_lvb(lkb->lkb_lvbptr);
dlm_free_lkb(lkb);
return 1;
} else {
spin_unlock(&ls->ls_lkbidr_spin);
return 0;
}
return rv;
}
int dlm_put_lkb(struct dlm_lkb *lkb)