From: Alan Cox <alan@lxorguk.ukuu.org.uk>
To: thunder7@xs4all.nl
Cc: linux-kernel@vger.kernel.org
Subject: Re: 2.4.19-ac1 and later: kernel BUG in apm.c:899 (SMP, apm=power-off)
Date: 05 Aug 2002 14:22:07 +0100 [thread overview]
Message-ID: <1028553727.18156.34.camel@irongate.swansea.linux.org.uk> (raw)
In-Reply-To: <20020805053156.GA476@middle.of.nowhere>
On Mon, 2002-08-05 at 06:31, Jurriaan wrote:
> Since 2.4.19-ac1 I occasionally (like 1 in 3 times) see an Oops while
> shutting down, containing the line
>
> kernel BUG in apm.c:899
>
> This is an Abit VP6 dual board, with a via chipset. Below you'll find
> lspci, (limited) dmesg, and .config information.
Basically its oopsing because it was about to make an APM call on a
processor other than CPU#0 (physical id), it set the cpus_allowed mask
to CPU#0 only and then rescheduled but ended up on a CPU that was not
CPU#0. Thats because its not making the right and proper calls for the
O(1) scheduler - Willy's patch I merged is right - but not for -ac.
I'll fix that in -ac5.
It should be enough to swap
current->cpus_allowed = 1;
with
set_cpus_allowed(current, 1 << cpu_logical_map(0));
in that file
prev parent reply other threads:[~2002-08-05 11:59 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-08-05 5:31 Jurriaan
2002-08-05 13:22 ` Alan Cox [this message]
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