linux-kernel - Re: sched: hang in migrate

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Message-ID: <20140224071028.GW9987@twins.programming.kicks-ass.net>
Date:	Mon, 24 Feb 2014 08:10:28 +0100
From:	Peter Zijlstra <peterz@...radead.org>
To:	Michael wang <wangyun@...ux.vnet.ibm.com>
Cc:	Sasha Levin <sasha.levin@...cle.com>,
	Ingo Molnar <mingo@...nel.org>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: sched: hang in migrate_swap

On Mon, Feb 24, 2014 at 01:19:15PM +0800, Michael wang wrote:
> Peter, do we accidentally missed this commit?
> 
> http://git.kernel.org/tip/477af336ba06ef4c32e97892bb0d2027ce30f466

Ingo dropped it on Saturday because it makes locking_selftest() unhappy.

That is because we call locking_selftest() way before we're ready to
call schedule() and guess what it does :-/

I'm not entirely sure what to do.. ideally I'd shoot locking_selftest in
the head, but clearly that's not entirely desired either.
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