From: Andi Kleen <andi@firstfloor.org>
To: Nuno Pais Fernandes <npf@eurotux.com>
Cc: linux-kernel@vger.kernel.org
Subject: Re: proc_stack for x86_64 (spinning process)
Date: Tue, 08 Apr 2008 13:21:53 +0200 [thread overview]
Message-ID: <87myo4pp66.fsf@basil.nowhere.org> (raw)
In-Reply-To: <200804081136.41876.npf@eurotux.com> (Nuno Pais Fernandes's message of "Tue, 8 Apr 2008 11:36:41 +0100")
Nuno Pais Fernandes <npf@eurotux.com> writes:
> Hi,
>
> I have a spinning process that it's locking my server (eating 100% CPU). I
> can't kill it even with kill -9
>
> I'm trying to use proc_stack to check what's the problem, compiling the kernel
> with
>
> http://linuxhacker.ru/~nikita/patches/2.6.12-rc6/2005.06.11/vm_07-proc-stack.patch
>
> But this patch is only for x86 as my arch is x86_64. Does anyone know if
> there's a patch for x86_64?
The standard way to handle that is to just do
echo 1 > /proc/sys/kernel/sysrq
echo t > /proc/sysrq-trigger
and then look for the process backtrace in the kernel log.
Another alternative is to use crash to take a live dump and then analyse that
using crash.
-Andi
next prev parent reply other threads:[~2008-04-08 11:29 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-04-08 10:36 Nuno Pais Fernandes
2008-04-08 11:21 ` Andi Kleen [this message]
2008-04-08 11:41 ` Nuno Fernandes
2008-04-08 11:49 ` Andi Kleen
2008-04-08 10:36 Nuno Fernandes
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