linux-kernel - Re: next-20130607 BUG: sleeping function called from invalid context at lib/idr.c:424

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Date:	Tue, 11 Jun 2013 11:38:20 -0700
From:	Davidlohr Bueso <davidlohr.bueso@...com>
To:	Valdis Kletnieks <Valdis.Kletnieks@...edu>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Tejun Heo <tj@...nel.org>, Al Viro <viro@...iv.linux.org.uk>,
	linux-kernel@...r.kernel.org
Subject: Re: next-20130607 BUG: sleeping function called from invalid
 context at lib/idr.c:424

On Tue, 2013-06-11 at 14:33 -0400, Valdis Kletnieks wrote:
> Tried to boot next-20130607, got this during early boot.  -0603 is OK, so
> whatever did it is a recent patch. Not sure who's fault it is, as idr_preload()
> has been there since February, apparently something in the SyS_semget()
> path has been changed...
> 
> Looking at 'git blame', I see a bunch of patches from Davidlohr Bueso on 06/07
> that hit ipc/util.c and friends.

Yeah, this is my fault. It was originally reported by Fengguang:
http://www.spinics.net/lists/kernel/msg1545633.html#.UbYI9qqdmV8

Sasha proposed a fix to use GFP_ATOMIC in idr_preload instead of
GFP_KERNEL:

http://lkml.org/lkml/2013/6/10/322

Thanks,
Davidlohr


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