Messages in this thread | | | Subject | Re: additional oom-killer tuneable worth submitting? | From | Peter Zijlstra <> | Date | Thu, 07 Dec 2006 20:21:32 +0100 |
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On Thu, 2006-12-07 at 12:30 -0600, Chris Friesen wrote: > The kernel currently has a way to adjust the oom-killer score via > /proc/<pid>/oomadj. > > However, to adjust this effectively requires knowledge of the scores of > all the other processes on the system. > > I'd like to float an idea (which we've implemented and been using for > some time) where the semantics are slightly different: > > We add a new "oom_thresh" member to the task struct. > We introduce a new proc entry "/proc/<pid>/oomthresh" to control it. > > The "oom-thresh" value maps to the max expected memory consumption for > that process. As long as a process uses less memory than the specified > threshold, then it is immune to the oom-killer.
You would need to specify the measure of memory used by your process; see the (still not resolved) RSS debate.
> 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. > > If a patch for the above feature was submitted, would there be any > chance of getting it included? Maybe controlled by a config option?
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