Re: PROBLEM: oom killer and swap weirdness on 2.6.3* kernels

[dave b]

On 14 May 2010 22:53, dave b <db.pub.mail@xxxxxxxxx> wrote:
> In 2.6.3* kernels (test case was performed on the 2.6.33.3 kernel)
> when physical memory runs out and there is a large swap partition -
> the system completely stalls.
>
> I noticed that when running debian lenny using dm-crypt Âwith
> encrypted / and swap with a Â2.6.33.3 kernel (and all of the 2.6.3*
> series iirc) when all physical memory is used (swapiness was left at
> the default 60) the system hangs and does not respond. It can resume
> normal operation some time later - however it seems to take a *very*
> long time for the oom killer to come in. Obviously with swapoff this
> doesn't happen - the oom killer comes in and does its job.
>
>
> free -m
>       total    used    free   shared  Âbuffers   cached
> Mem: Â Â Â Â Â1980 Â Â Â 1101 Â Â Â Â879 Â Â Â Â Â0 Â Â Â Â 58 Â Â Â Â201
> -/+ buffers/cache: Â Â Â Â840 Â Â Â 1139
> Swap: Â Â Â Â24943 Â Â Â Â Â0 Â Â Â24943
>
>
> My simple test case is
>
> dd if=/dev/zero of=/tmp/stall
> and wait till /tmp fills...
>

Sorry - I forgot to say I am running x86-64
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