Function zone_free_item

freebsd/vm/uma_core.c:4574–4601

* Frees a single item to any zone. * * Arguments: * zone The zone to free to * item The item we're freeing * udata User supplied data for the dtor * skip Skip dtors and finis */

 *	skip   Skip dtors and finis
 */
static __noinline void
zone_free_item(uma_zone_t zone, void *item, void *udata, enum zfreeskip skip)
{

	/*
	 * If a free is sent directly to an SMR zone we have to
	 * synchronize immediately because the item can instantly
	 * be reallocated. This should only happen in degenerate
	 * cases when no memory is available for per-cpu caches.
	 */
	if ((zone->uz_flags & UMA_ZONE_SMR) != 0 && skip == SKIP_NONE)
		smr_synchronize(zone->uz_smr);

	item_dtor(zone, item, zone->uz_size, udata, skip);

	if (skip < SKIP_FINI && zone->uz_fini)
		zone->uz_fini(item, zone->uz_size);

	zone->uz_release(zone->uz_arg, &item, 1);

	if (skip & SKIP_CNT)
		return;

	counter_u64_add(zone->uz_frees, 1);

	if (zone->uz_max_items > 0)
		zone_free_limit(zone, 1);
}

/* See uma.h */
int