linux-kernel - Re: migration thread and active_load

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Message-ID: <ba7d8f720804211238q114c2ffal902e8b5e3dccd881@mail.gmail.com>
Date:	Mon, 21 Apr 2008 15:38:39 -0400
From:	"Dan Upton" <upton.dan.linux@...il.com>
To:	"Dmitry Adamushko" <dmitry.adamushko@...il.com>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: migration thread and active_load_balance

On Mon, Apr 21, 2008 at 7:03 AM, Dmitry Adamushko
<dmitry.adamushko@...il.com> wrote:
> On 21/04/2008, Dan Upton <upton.dan.linux@...il.com> wrote:
>  > [ ... ]
>
> >
>  >  kernel BUG at kernel/sched.c:2103
>
>  and what's this line in your patched sched.c?
>
>  is it -- BUG_ON(!irqs_disabled());  ?
>
>  anything in your unposted code (e.g. find_coolest_cpu()) that might
>  re-enable the interrupts before __migration_task() is called?
>
>  If you post your modifications as a patch
>  (Documentation/applying-patches.txt) that contains _all_ relevant
>  modifications, it'd be easier to guess what's wrong.

Yes, that's the line.  I don't recall ever reenabling interrupts, but
maybe somebody will see what I'm missing.  I've attached a full diff;
there are a few other places I've made changes for other scheduling
stuff that you'll see in the diff, that have all tested fine.

-dan

Download attachment "thermdiff" of type "application/octet-stream" (34719 bytes)