Author: kib
Date: Sat Aug 17 07:10:01 2013
New Revision: 254439
URL: http://svnweb.freebsd.org/changeset/base/254439
Log:
Remove the arbitrary binding of the pagedaemon threads to the domains,
update the comment accordingly and make it more precise.
Requested and reviewed by: jeff (previous version)
Modified:
head/sys/vm/vm_pageout.c
Modified: head/sys/vm/vm_pageout.c
==============================================================================
--- head/sys/vm/vm_pageout.c Sat Aug 17 06:29:45 2013 (r254438)
+++ head/sys/vm/vm_pageout.c Sat Aug 17 07:10:01 2013 (r254439)
@@ -1575,35 +1575,16 @@ static void
vm_pageout_worker(void *arg)
{
struct vm_domain *domain;
- struct pcpu *pc;
- int cpu, domidx;
+ int domidx;
domidx = (uintptr_t)arg;
domain = &vm_dom[domidx];
/*
- * XXXKIB The bind is rather arbitrary. With some minor
- * complications, we could assign the cpuset consisting of all
- * CPUs in the same domain. In fact, it even does not matter
- * if the CPU we bind to is in the affinity domain of this
- * page queue, we only need to establish the fair distribution
- * of pagedaemon threads among CPUs.
- *
- * XXXKIB It would be useful to allocate vm_pages for the
- * domain from the domain, and put pcpu area into the page
- * owned by the domain.
+ * XXXKIB It could be useful to bind pageout daemon threads to
+ * the cores belonging to the domain, from which vm_page_array
+ * is allocated.
*/
- if (mem_affinity != NULL) {
- CPU_FOREACH(cpu) {
- pc = pcpu_find(cpu);
- if (pc->pc_domain == domidx) {
- thread_lock(curthread);
- sched_bind(curthread, cpu);
- thread_unlock(curthread);
- break;
- }
- }
- }
KASSERT(domain->vmd_segs != 0, ("domain without segments"));
vm_pageout_init_marker(&domain->vmd_marker, PQ_INACTIVE);
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