From: Dave Chinner <david@fromorbit.com>
To: Alexander Beregalov <a.beregalov@gmail.com>
Cc: lachlan@sgi.com, Christoph Hellwig <hch@infradead.org>,
Arjan van de Ven <arjan@infradead.org>,
xfs@oss.sgi.com, linux-next@vger.kernel.org,
LKML <linux-kernel@vger.kernel.org>
Subject: Re: BUG: sleeping function called from invalid context at kernel/rwsem.c:131 XFS? (was: Re: linux-next: Tree for October 17)
Date: Wed, 22 Oct 2008 19:28:29 +1100 [thread overview]
Message-ID: <20081022082828.GN18495@disturbed> (raw)
In-Reply-To: <a4423d670810220121k27ab3d1dp1921ea282786eebc@mail.gmail.com>
On Wed, Oct 22, 2008 at 12:21:23PM +0400, Alexander Beregalov wrote:
> > Ah, OK, I see the problem, though I don't understand why I'm not
> > seeing the might_sleep() triggering all the time given that I always
> > build with:
> >
> > $ grep SLEEP .config
> > CONFIG_DEBUG_SPINLOCK_SLEEP=y
> >
> > Basically the above commit moved xfs_ilock() inside
> > radix_tree_preload()/radix_tree_preload_end(), which means we are
> > taking a rwsem() while we have an elevated preempt count. I'll
> > get a patch out to fix it.
> Could it cause the I/O dead lock or should I continue trying to reproduce it?
The deadlock wouldn't be produced by the same thing that
produced the sleeping-in-atomic warning. The missed unlock that
I also fixed in the patch I just sent could possibly have caused
that, but I'm just speculating on that...
Cheers,
Dave.
--
Dave Chinner
david@fromorbit.com
next prev parent reply other threads:[~2008-10-22 8:28 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-10-17 12:43 BUG: sleeping function called from invalid context at kernel/rwsem.c:131 XFS? (was: Re: linux-next: Tree for October 17) Alexander Beregalov
2008-10-17 16:41 ` Christoph Hellwig
2008-10-17 16:54 ` Alexander Beregalov
2008-10-17 16:57 ` Christoph Hellwig
2008-10-17 17:13 ` Alexander Beregalov
2008-10-17 20:37 ` Christoph Hellwig
2008-10-17 20:55 ` Arjan van de Ven
2008-10-20 14:58 ` Alexander Beregalov
2008-10-20 16:33 ` Christoph Hellwig
2008-10-20 17:13 ` Alexander Beregalov
2008-10-20 22:35 ` Dave Chinner
2008-10-21 11:42 ` Alexander Beregalov
2008-10-22 7:58 ` Dave Chinner
2008-10-22 8:21 ` Alexander Beregalov
2008-10-22 8:28 ` Dave Chinner [this message]
2008-10-22 8:25 ` Dave Chinner
2008-10-22 9:12 ` Alexander Beregalov
2008-10-22 10:13 ` Christoph Hellwig
2008-10-22 21:10 ` Dave Chinner
2008-10-22 15:06 ` BUG: sleeping function called from invalid context at kernel/rwsem.c:131 XFS? Johannes Weiner
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