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Date: Fri, 17 Apr 2009 09:17:37 +0900 From: KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com> To: KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com> Cc: balbir@...ux.vnet.ibm.com, "linux-mm@...ck.org" <linux-mm@...ck.org>, "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>, Andrew Morton <akpm@...ux-foundation.org> Subject: Re: [PATCH] Add file based RSS accounting for memory resource controller (v2) On Fri, 17 Apr 2009 09:14:59 +0900 KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com> wrote: > page_cgroup->mem_cgroup != try_get_mem_cgroup_from_mm(mm); in many many cases. > > For example, libc and /bin/*** is tend to be loaded into default cgroup at boot but > used by many cgroups. But mapcount of page caches for /bin/*** is 0 if not running. > > Then, File_Mapped can be greater than Cached easily if you use mm->owner. > > I can't estimate RSS in *my* cgroup if File_Mapped includes pages which is under > other cgroups. It's meaningless. > Especially, when Cached==0 but File_Mapped > 0, I think "oh, the kernel leaks somehing..hmm..." > > By useing page_cgroup->mem_cgroup, we can avoid above mess. > And, if pc->mem_cgroup is used, we can ignore "task move". Thanks, -Kame -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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