linux-kernel - Re: additional oom-killer tuneable worth submitting?

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Message-Id: <200612081658.29338.a1426z@gawab.com>
Date:	Fri, 8 Dec 2006 16:58:29 +0300
From:	Al Boldi <a1426z@...ab.com>
To:	linux-kernel@...r.kernel.org
Subject: Re: additional oom-killer tuneable worth submitting?

Alan wrote:
> > On an embedded platform this allows the designer to engineer the system
> > and protect critical apps based on their expected memory consumption.
> > If one of those apps goes crazy and starts chewing additional memory
> > then it becomes vulnerable to the oom killer while the other apps remain
> > protected.
>
> That is why we have no-overcommit support.

Alan, I think you know that this isn't really true, due to shared-libs.

> Now there is an argument for
> a meaningful rlimit-as to go with it, and together I think they do what
> you really need.

The problem with rlimit is that it works per process.  Tuning this by hand 
may be awkward and/or wasteful.  What we need is to rlimit on a global 
basis, by calculating an upperlimit dynamically, such as to avoid 
overcommit/OOM.

Thanks!

--
Al

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