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Date: Fri, 31 Oct 2014 09:36:27 +0800
From: Liu Bo <bo.li.liu@oracle.com>
To: Toralf =?iso-8859-1?Q?F=F6rster?= <toralf.foerster@gmx.de>
Cc: linux-btrfs@vger.kernel.org
Subject: Re: v3.18-rc2 at a 32 bit KVM gives :"INFO: trying to register
 non-static key.the code is fine but needs lockdep annotation."
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On Fri, Oct 31, 2014 at 12:33:43AM +0100, Toralf Förster wrote:
> On 10/30/2014 11:15 AM, Liu Bo wrote:
> > On Wed, Oct 29, 2014 at 05:56:33PM +0100, Toralf Förster wrote:
> >> > This is new in my eyes, or ? :
> > Also new to me, could you please turn on lock debug and try again?
> > 
> > thanks,
> > -liubo
> you mean CONFIG_PROVE_LOCKING=y right ?

I'd have these open,

CONFIG_DEBUG_SPINLOCK=y
CONFIG_DEBUG_LOCK_ALLOC=y
CONFIG_DEBUG_LOCKDEP=y

__btrfs_alloc_chunk() uses write_[un]lock and spin_[un]lock, it may tell us something.

thanks,
-liubo