Messages in this thread | | | Date | Tue, 22 Nov 2011 09:36:22 +0900 | From | KAMEZAWA Hiroyuki <> | Subject | Re: [PATCH] fix mem_cgroup_split_huge_fixup to work efficiently. |
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On Mon, 21 Nov 2011 16:30:11 +0530 Balbir Singh <bsingharora@gmail.com> wrote:
> On Thu, Nov 17, 2011 at 7:03 AM, KAMEZAWA Hiroyuki > <kamezawa.hiroyu@jp.fujitsu.com> wrote: > > > > I'll send this again when mm is shipped. > > I sometimes see mem_cgroup_split_huge_fixup() in perf report and noticed > > it's very slow. This fixes it. Any comments are welcome. > > > > How do you see this - what tests? > Sometimes. By applications calling fork() or mremap(), mprotect(), which will cause split_huge_page(). But not 100% reporoducable, yet.
Thanks, -Kame
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