Function vm_page_pqbatch_drain

freebsd/vm/vm_page.c:3627–3657

* vm_page_pqbatch_drain: [ internal use only ] * * Force all per-CPU page queue batch queues to be drained. This is * intended for use in severe memory shortages, to ensure that pages * do not remain stuck in the batch queues. */

 *	do not remain stuck in the batch queues.
 */
void
vm_page_pqbatch_drain(void)
{
	struct thread *td;
	struct vm_domain *vmd;
	struct vm_pagequeue *pq;
	int cpu, domain, queue;

	td = curthread;
	CPU_FOREACH(cpu) {
		thread_lock(td);
		sched_bind(td, cpu);
		thread_unlock(td);

		for (domain = 0; domain < vm_ndomains; domain++) {
			vmd = VM_DOMAIN(domain);
			for (queue = 0; queue < PQ_COUNT; queue++) {
				pq = &vmd->vmd_pagequeues[queue];
				vm_pagequeue_lock(pq);
				critical_enter();
				vm_pqbatch_process(pq,
				    DPCPU_PTR(pqbatch[domain][queue]), queue);
				critical_exit();
				vm_pagequeue_unlock(pq);
			}
		}
	}
	thread_lock(td);
	sched_unbind(td);
	thread_unlock(td);
}

/*
 *	vm_page_dequeue_deferred:	[ internal use only ]