Re: [PATCH] RSS ulimit enforcement for 2.6.8

[Nick Piggin]

Rik van Riel wrote:

> On Thu, 5 Aug 2004, Andrew Morton wrote:
>
>
> > Good question.  What I'm groping for here is some definition of what we
> > actually want the feature to _do_.  Once we have that, and have suitably
> > argued about it, we can then go off and see if the patch actually does it.
>
> What I want the feature to do is allow users to set an
> RSS rlimit to prevent a process from hogging up all the
> machine's memory.
>
> I am not looking for a hard memory limit, since that
> would just cause extra IO, which has bad consequences
> for the rest of the system.
>
> In addition, I would like the patch to be relatively
> low impact, not giving us much maintenance overhead or
> much runtime overhead.
>
> If anybody has good reasons for needing hard per-process
> RSS limits, let us know.  So far I haven't seen anybody
> with a workload that somehow requires a hard limit.
FWIW, I like Rik's approach. One tiny request might be just to do the
patch underneath the thrashing control patch so it can be sent to Linus
earlier.

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