linux-kernel - Re: [tip:sched/urgent] sched: Check sched

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Date:	Wed, 27 Nov 2013 18:57:49 -0800 (PST)
From:	David Rientjes <rientjes@...gle.com>
To:	mingo@...nel.org, hpa@...or.com, linux-kernel@...r.kernel.org,
	srikar@...ux.vnet.ibm.com, peterz@...radead.org, tglx@...utronix.de
cc:	linux-tip-commits@...r.kernel.org
Subject: Re: [tip:sched/urgent] sched:  Check sched_domain before computing
 group power

On Tue, 19 Nov 2013, tip-bot for Srikar Dronamraju wrote:

> Commit-ID:  9abf24d465180f5f2eb26a43545348262f16b771
> Gitweb:     http://git.kernel.org/tip/9abf24d465180f5f2eb26a43545348262f16b771
> Author:     Srikar Dronamraju <srikar@...ux.vnet.ibm.com>
> AuthorDate: Tue, 12 Nov 2013 22:11:26 +0530
> Committer:  Ingo Molnar <mingo@...nel.org>
> CommitDate: Tue, 19 Nov 2013 17:01:15 +0100
> 
> sched: Check sched_domain before computing group power
> 
> After commit 863bffc80898 ("sched/fair: Fix group power_orig
> computation"), we can dereference rq->sd before it is set.
> 
> Fix this by falling back to power_of() in this case and add a comment
> explaining things.
> 
> Signed-off-by: Srikar Dronamraju <srikar@...ux.vnet.ibm.com>
> [ Added comment and tweaked patch. ]
> Signed-off-by: Peter Zijlstra <peterz@...radead.org>
> Cc: mikey@...ling.org
> Link: http://lkml.kernel.org/r/20131113151718.GN21461@twins.programming.kicks-ass.net
> Signed-off-by: Ingo Molnar <mingo@...nel.org>

Acked-by: David Rientjes <rientjes@...gle.com>

Fixes a boot failure for me, thanks.
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