linux-kernel - Re: spontaneous reboots and hangs on x86

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Date:	Sat, 17 May 2008 13:23:17 +1000
From:	Stephen Rothwell <sfr@...b.auug.org.au>
To:	Ingo Molnar <mingo@...e.hu>
Cc:	Mariusz Kozlowski <m.kozlowski@...land.pl>,
	Adrian Bunk <bunk@...nel.org>, kernel-testers@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Andrew Morton <akpm@...ux-foundation.org>,
	linux-next@...r.kernel.org, Gregory Haskins <ghaskins@...ell.com>
Subject: Re: spontaneous reboots and hangs on x86_64

Hi Ingo,

On Fri, 16 May 2008 20:53:36 +0200 Mariusz Kozlowski <m.kozlowski@...land.pl> wrote:
>
> Ok I got bisection working finally, now I'm at d5be23e2 I have something like 80 revisions left and
> I'm stuck with this:
> 
> In file included from kernel/sched.c:1861:
> kernel/sched_rt.c: In function 'check_preempt_curr_rt':
> kernel/sched_rt.c:653: error: implicit declaration of function 'cpupri_find'
> kernel/sched_rt.c:653: error: 'struct root_domain' has no member named 'cpupri'
> make[1]: *** [kernel/sched.o] Error 1
> make: *** [kernel] Error 2

This error is caused by commit 677ceea32cf1d8ba9a4870bc58079cd7e7f77558
("sched: prioritize non-migratable tasks over migratable ones") in the
sched tree (sched/for-akpm).  This commit is either just wrong, is was
misrebased, or is just badly out of order.  It introduces a use of
cpupri_find, but the function is not defined until commit
ea9b3c95b7c666d4658a139b88587269e5baa647 ("sched: use a 2-d bitmap for
searching lowest-pri CPU") about 146 commits later ...

-- 
Cheers,
Stephen Rothwell                    sfr@...b.auug.org.au
http://www.canb.auug.org.au/~sfr/

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