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Date: Fri, 14 May 2010 23:14:23 +1000 From: dave b <db.pub.mail@...il.com> To: linux-kernel@...r.kernel.org Subject: Re: PROBLEM: oom killer and swap weirdness on 2.6.3* kernels On 14 May 2010 22:53, dave b <db.pub.mail@...il.com> 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 with > encrypted / and swap with a 2.6.33.3 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 buffers cached > Mem: 1980 1101 879 0 58 201 > -/+ buffers/cache: 840 1139 > Swap: 24943 0 24943 > > > 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 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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