linux-kernel - Re: sleeping functions called in invalid context during resume

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Message-ID: <20061115180436.GB29795@elte.hu>
Date:	Wed, 15 Nov 2006 19:04:36 +0100
From:	Ingo Molnar <mingo@...e.hu>
To:	Stephen Hemminger <shemminger@...l.org>
Cc:	Andrew Morton <akpm@...l.org>, linux-kernel@...r.kernel.org
Subject: Re: sleeping functions called in invalid context during resume


* Stephen Hemminger <shemminger@...l.org> wrote:

> > The patch below makes use of that capability of lockdep for all 
> > stackdumps that are printed to the console. Stephen, please apply 
> > this patch, enable CONFIG_PROVE_LOCKING and try to trigger another 
> > message.
> 
> I tried but with CONFIG_PROVE_LOCKING, resume gets stuck in an 
> infinite loop backtracing to the console.  Unfortunately, the serial 
> console isn't up at that point so it it isn't capturable.

hm - could you change the stack- UNWIND option (to on or off) to see 
whether that makes a difference? If it doesnt help, could you try 
CONFIG_DISABLE_CONSOLE_SUSPEND [but that might hang your resume earlier 
than the bug triggers].

	Ingo
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