diff options
author | Alexander Aring <aahringo@redhat.com> | 2024-04-15 21:39:43 +0300 |
---|---|---|
committer | David Teigland <teigland@redhat.com> | 2024-04-16 22:45:57 +0300 |
commit | 15fd7e55177a8d6243096bb6b9536cd15f56d547 (patch) | |
tree | ffb40d5c8a085d8b20d58154a0c00a2dcc5c9871 /fs/dlm | |
parent | e91313591b29ce724fe2f1bdf29f2482878fc275 (diff) | |
download | linux-15fd7e55177a8d6243096bb6b9536cd15f56d547.tar.xz |
dlm: use rwlock for lkbidr
Convert the lock for lkbidr to an rwlock. Most idr lookups will use
the read lock.
Signed-off-by: Alexander Aring <aahringo@redhat.com>
Signed-off-by: David Teigland <teigland@redhat.com>
Diffstat (limited to 'fs/dlm')
-rw-r--r-- | fs/dlm/dlm_internal.h | 2 | ||||
-rw-r--r-- | fs/dlm/lock.c | 44 | ||||
-rw-r--r-- | fs/dlm/lockspace.c | 6 |
3 files changed, 11 insertions, 41 deletions
diff --git a/fs/dlm/dlm_internal.h b/fs/dlm/dlm_internal.h index b675bffb61ae..19e57cbd5b13 100644 --- a/fs/dlm/dlm_internal.h +++ b/fs/dlm/dlm_internal.h @@ -582,7 +582,7 @@ struct dlm_ls { struct kobject ls_kobj; struct idr ls_lkbidr; - spinlock_t ls_lkbidr_spin; + rwlock_t ls_lkbidr_lock; struct rhashtable ls_rsbtbl; rwlock_t ls_rsbtbl_lock; diff --git a/fs/dlm/lock.c b/fs/dlm/lock.c index 790d0fd76bbe..bbbc9593a64e 100644 --- a/fs/dlm/lock.c +++ b/fs/dlm/lock.c @@ -1522,11 +1522,11 @@ static int _create_lkb(struct dlm_ls *ls, struct dlm_lkb **lkb_ret, INIT_LIST_HEAD(&lkb->lkb_ownqueue); INIT_LIST_HEAD(&lkb->lkb_rsb_lookup); - spin_lock_bh(&ls->ls_lkbidr_spin); + write_lock_bh(&ls->ls_lkbidr_lock); rv = idr_alloc(&ls->ls_lkbidr, lkb, start, end, GFP_NOWAIT); if (rv >= 0) lkb->lkb_id = rv; - spin_unlock_bh(&ls->ls_lkbidr_spin); + write_unlock_bh(&ls->ls_lkbidr_lock); if (rv < 0) { log_error(ls, "create_lkb idr error %d", rv); @@ -1547,11 +1547,11 @@ static int find_lkb(struct dlm_ls *ls, uint32_t lkid, struct dlm_lkb **lkb_ret) { struct dlm_lkb *lkb; - spin_lock_bh(&ls->ls_lkbidr_spin); + read_lock_bh(&ls->ls_lkbidr_lock); lkb = idr_find(&ls->ls_lkbidr, lkid); if (lkb) kref_get(&lkb->lkb_ref); - spin_unlock_bh(&ls->ls_lkbidr_spin); + read_unlock_bh(&ls->ls_lkbidr_lock); *lkb_ret = lkb; return lkb ? 0 : -ENOENT; @@ -1567,36 +1567,6 @@ static void kill_lkb(struct kref *kref) DLM_ASSERT(!lkb->lkb_status, dlm_print_lkb(lkb);); } -/* TODO move this to lib/refcount.c */ -static __must_check bool -dlm_refcount_dec_and_lock_bh(refcount_t *r, spinlock_t *lock) -__cond_acquires(lock) -{ - if (refcount_dec_not_one(r)) - return false; - - spin_lock_bh(lock); - if (!refcount_dec_and_test(r)) { - spin_unlock_bh(lock); - return false; - } - - return true; -} - -/* TODO move this to include/linux/kref.h */ -static inline int dlm_kref_put_lock_bh(struct kref *kref, - void (*release)(struct kref *kref), - spinlock_t *lock) -{ - if (dlm_refcount_dec_and_lock_bh(&kref->refcount, lock)) { - release(kref); - return 1; - } - - return 0; -} - /* __put_lkb() is used when an lkb may not have an rsb attached to it so we need to provide the lockspace explicitly */ @@ -1605,11 +1575,11 @@ static int __put_lkb(struct dlm_ls *ls, struct dlm_lkb *lkb) uint32_t lkid = lkb->lkb_id; int rv; - rv = dlm_kref_put_lock_bh(&lkb->lkb_ref, kill_lkb, - &ls->ls_lkbidr_spin); + rv = dlm_kref_put_write_lock_bh(&lkb->lkb_ref, kill_lkb, + &ls->ls_lkbidr_lock); if (rv) { idr_remove(&ls->ls_lkbidr, lkid); - spin_unlock_bh(&ls->ls_lkbidr_spin); + write_unlock_bh(&ls->ls_lkbidr_lock); detach_lkb(lkb); diff --git a/fs/dlm/lockspace.c b/fs/dlm/lockspace.c index 04f4c74831ce..5ce26882159e 100644 --- a/fs/dlm/lockspace.c +++ b/fs/dlm/lockspace.c @@ -431,7 +431,7 @@ static int new_lockspace(const char *name, const char *cluster, goto out_lsfree; idr_init(&ls->ls_lkbidr); - spin_lock_init(&ls->ls_lkbidr_spin); + rwlock_init(&ls->ls_lkbidr_lock); INIT_LIST_HEAD(&ls->ls_waiters); spin_lock_init(&ls->ls_waiters_lock); @@ -676,7 +676,7 @@ static int lockspace_busy(struct dlm_ls *ls, int force) { int rv; - spin_lock_bh(&ls->ls_lkbidr_spin); + read_lock_bh(&ls->ls_lkbidr_lock); if (force == 0) { rv = idr_for_each(&ls->ls_lkbidr, lkb_idr_is_any, ls); } else if (force == 1) { @@ -684,7 +684,7 @@ static int lockspace_busy(struct dlm_ls *ls, int force) } else { rv = 0; } - spin_unlock_bh(&ls->ls_lkbidr_spin); + read_unlock_bh(&ls->ls_lkbidr_lock); return rv; } |