Re: cgroups and overcommit question

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Hi.

On Wed, 12 Jan 2011 18:40:37 +0300
Evgeniy Ivanov <lolkaantimat@xxxxxxxxx> wrote:

> Hello,
> 
> When I forbid memory overcommiting, malloc() returns 0 if can't
> reserve memory, but in a cgroup it will always succeed, when it can
> succeed when not in the group.
> E.g. I've set 2 to overcommit_memory, limit is 10M: I can ask malloc
> 100M and it will not return any error (kernel is 2.6.32).
> Is it expected behavior?
> 
Yes. Because memory cgroup can be used for limiting the memory(and swap) size
which is physically used, not the malloc'ed size.

Thanks,
Daisuke Nishimura.

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