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Re: 2.6.39-rc4+: oom-killer busy killing tasks

To: Dave Chinner <david@xxxxxxxxxxxxx>
Subject: Re: 2.6.39-rc4+: oom-killer busy killing tasks
From: Christian Kujau <lists@xxxxxxxxxxxxxxx>
Date: Fri, 29 Apr 2011 10:32:16 -0700 (PDT)
Cc: LKML <linux-kernel@xxxxxxxxxxxxxxx>, xfs@xxxxxxxxxxx
In-reply-to: <20110428233751.GR12436@dastard>
References: <alpine.DEB.2.01.1104211841510.18728@xxxxxxxxxxxxxx> <20110424234655.GC12436@dastard> <alpine.DEB.2.01.1104242245090.18728@xxxxxxxxxxxxxx> <alpine.DEB.2.01.1104250015480.18728@xxxxxxxxxxxxxx> <20110427022655.GE12436@dastard> <alpine.DEB.2.01.1104270042510.18728@xxxxxxxxxxxxxx> <20110427102824.GI12436@dastard> <alpine.DEB.2.01.1104281008320.18728@xxxxxxxxxxxxxx> <20110428233751.GR12436@dastard>
User-agent: Alpine 2.01 (DEB 1266 2009-07-14)
On Fri, 29 Apr 2011 at 09:37, Dave Chinner wrote:
> Did you read the email that pointed to CONFIG_TINY_RCU as the
> ptotential source of the problem? Can you change to CONFIG_TREE_RCU
> and see if the problem goes away?

For that I had to select SMP on this UP-PowerPC G4 machine. But compiling 
-rc5 (as the bug is strill present in -rc5) fails with:

/usr/local/src/linux-2.6-git/arch/powerpc/kernel/crash.c: In function 
‘default_machine_crash_shutdown’:
/usr/local/src/linux-2.6-git/arch/powerpc/kernel/crash.c:349: error: 
implicit declaration of function ‘crash_kexec_wait_realmode’
make[2]: *** [arch/powerpc/kernel/crash.o] Error 1
make[1]: *** [arch/powerpc/kernel] Error 2
make: *** [sub-make] Error 2

Maybe I'll just disable kexec and see if TREE_RCU helps.

Meanwhile, I gave up on the git bisect, as I can hardly boot inbetween 
commits: http://nerdbynature.de/bits/2.6.39-rc4/oom/git-bisect-log.txt

Thanks,
Christian.
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