On Fri, 2015-07-24 at 10:12 -0700, Jörn Engel wrote: > On Fri, Jul 24, 2015 at 08:59:59AM +0200, Michal Hocko wrote: > > On Thu 23-07-15 14:54:31, Spencer Baugh wrote: > > > From: Joern Engel <joern@xxxxxxxxx> > > > > > > ~150ms scheduler latency for both observed in the wild. > > > > This is way to vague. Could you describe your problem somehow more, > > please? > > There are schduling points in the page allocator (when it triggers the > > reclaim), why are those not sufficient? Or do you manage to allocate > > many hugetlb pages without performing the reclaim and that leads to > > soft lockups? > > We don't use transparent hugepages - they cause too much latency. > Instead we reserve somewhere around 3/4 or so of physical memory for > hugepages. "sysctl -w vm.nr_hugepages=100000" or something similar in a > startup script. > > Since it is early in boot we don't go through page reclaim. Still, please be more verbose about what you _are_ encountering. Iow, please have decent changelog in v2. -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>