if (dd == NULL) {
dsl_dir_t *winner;
- dd = kmem_zalloc(sizeof (dsl_dir_t), KM_SLEEP);
+ dd = kmem_zalloc(sizeof (dsl_dir_t), KM_PUSHPAGE);
dd->dd_object = ddobj;
dd->dd_dbuf = dbuf;
dd->dd_pool = dp;
/*
* There should be exactly two holds, both from
* dsl_dataset_destroy: one on the dd directory, and one on its
- * head ds. Otherwise, someone is trying to lookup something
- * inside this dir while we want to destroy it. The
- * config_rwlock ensures that nobody else opens it after we
- * check.
+ * head ds. If there are more holds, then a concurrent thread is
+ * performing a lookup inside this dir while we're trying to destroy
+ * it. To minimize this possibility, we perform this check only
+ * in syncing context and fail the operation if we encounter
+ * additional holds. The dp_config_rwlock ensures that nobody else
+ * opens it after we check.
*/
- if (dmu_buf_refcount(dd->dd_dbuf) > 2)
+ if (dmu_tx_is_syncing(tx) && dmu_buf_refcount(dd->dd_dbuf) > 2)
return (EBUSY);
err = zap_count(mos, dd->dd_phys->dd_child_dir_zapobj, &count);
asize - ref_rsrv);
mutex_exit(&dd->dd_lock);
- tr = kmem_zalloc(sizeof (struct tempreserve), KM_SLEEP);
+ tr = kmem_zalloc(sizeof (struct tempreserve), KM_PUSHPAGE);
tr->tr_ds = dd;
tr->tr_size = asize;
list_insert_tail(tr_list, tr);
return (0);
}
- tr_list = kmem_alloc(sizeof (list_t), KM_SLEEP);
+ tr_list = kmem_alloc(sizeof (list_t), KM_PUSHPAGE);
list_create(tr_list, sizeof (struct tempreserve),
offsetof(struct tempreserve, tr_node));
ASSERT3S(asize, >, 0);
if (err == 0) {
struct tempreserve *tr;
- tr = kmem_zalloc(sizeof (struct tempreserve), KM_SLEEP);
+ tr = kmem_zalloc(sizeof (struct tempreserve), KM_PUSHPAGE);
tr->tr_size = lsize;
list_insert_tail(tr_list, tr);
if (err == 0) {
struct tempreserve *tr;
- tr = kmem_zalloc(sizeof (struct tempreserve), KM_SLEEP);
+ tr = kmem_zalloc(sizeof (struct tempreserve), KM_PUSHPAGE);
tr->tr_dp = dd->dd_pool;
tr->tr_size = asize;
list_insert_tail(tr_list, tr);
mutex_enter(&dd->dd_lock);
dd->dd_phys->dd_quota = effective_value;
mutex_exit(&dd->dd_lock);
-
- spa_history_log_internal(LOG_DS_QUOTA, dd->dd_pool->dp_spa,
- tx, "%lld dataset = %llu ",
- (longlong_t)effective_value, dd->dd_phys->dd_head_dataset_obj);
}
int
delta, 0, 0, tx);
}
mutex_exit(&dd->dd_lock);
-
- spa_history_log_internal(LOG_DS_RESERVATION, dd->dd_pool->dp_spa,
- tx, "%lld dataset = %llu",
- (longlong_t)effective_value, dd->dd_phys->dd_head_dataset_obj);
}
int