svn commit: r236685 - stable/8/sys/vm
emax at FreeBSD.org
Wed Jun 6 16:20:59 UTC 2012
Date: Wed Jun 6 16:20:59 2012
New Revision: 236685
Seems applicable here as well.
Tweak condition for disabling allocation from per-CPU buckets in
low memory situation. I've observed a situation where per-CPU
allocations were disabled while there were enough free cached pages.
Basically, cnt.v_free_count was sitting stable at a value lower
than cnt.v_free_min and that caused massive performance drop.
Reviewed by: alc
Requested by: Andrew Boyer aboyer at averesystems dot com
stable/8/sys/ (props changed)
--- stable/8/sys/vm/uma_core.c Wed Jun 6 16:01:45 2012 (r236684)
+++ stable/8/sys/vm/uma_core.c Wed Jun 6 16:20:59 2012 (r236685)
@@ -267,10 +267,7 @@ SYSCTL_PROC(_vm, OID_AUTO, zone_stats, C
- if (cnt.v_free_count < cnt.v_free_min)
- bucketdisable = 1;
- bucketdisable = 0;
+ bucketdisable = vm_page_count_min();
More information about the svn-src-stable-8