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Date: Fri, 8 Jun 2012 16:51:47 +0200 From: Michal Hocko <mhocko@...e.cz> To: Ron Chen <ron_chen_123@...oo.com> Cc: Linux Mailing List <linux-kernel@...r.kernel.org>, linux-mm@...ck.org, cgroups mailinglist <cgroups@...r.kernel.org> Subject: Re: memcg cgroup controller & sbrk interaction On Thu 07-06-12 18:19:07, Ron Chen wrote: [...] > However, not only us, but others have found that the memcg controller > does not cause sbrk(2) or mmap(2) to return error when the cgroup is > under high memory pressure. Yes, because memory controller tracks the allocated memory (with page granularity) rather than address space. So the memory is accounted when it is faulted in. > Further, when the amount of free memory is really low, the Linux > Kernel OOM killer picks something and kills it. Yes, this is the result of the design when the memory is tracked during page faults. > http://www.spinics.net/lists/cgroups/msg02622.html > > > We also would like to see if it is technically possible for the > Virtual Memory Manager to interact with the memory controller > properly and give us the semantics of setrlimit(2). What prevents you from using setrlimit from inside the group? -- Michal Hocko SUSE Labs SUSE LINUX s.r.o. Lihovarska 1060/12 190 00 Praha 9 Czech Republic -- 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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