linux-kernel - Re: BUG: sleeping function called from invalid context at kernel/mutex.c

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Message-ID: <1302077253.2225.1360.camel@twins>
Date:	Wed, 06 Apr 2011 10:07:33 +0200
From:	Peter Zijlstra <peterz@...radead.org>
To:	"Rafael J. Wysocki" <rjw@...k.pl>
Cc:	Thomas Gleixner <tglx@...utronix.de>,
	Xiaotian Feng <dfeng@...hat.com>,
	LKML <linux-kernel@...r.kernel.org>, Ingo Molnar <mingo@...e.hu>,
	Venkatesh Pallipadi <venki@...gle.com>,
	Suresh Siddha <suresh.b.siddha@...el.com>,
	"H. Peter Anvin" <hpa@...or.com>
Subject: Re: BUG: sleeping function called from invalid context at
 kernel/mutex.c

On Wed, 2011-04-06 at 06:43 +0200, Rafael J. Wysocki wrote:
> > the $subject text sound like it triggered might_sleep(), and that had a
> > system_state != SYSTEM_RUNNING bail condition, but then, I've no clue
> > what resume looks like.
> 
> Early resume looks pretty much like the system startup, e.g. everything
> called from syscore_ops should not be sleepable (although mutexes shouldn't
> trigger, because that code is effectively single-threaded, unless somebody
> holds the mutex in question when that code is being executed, but that would
> deadlock anyway). 

Right, so system_state != SYSTEM_RUNNING should be true for resume?
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