From: Christoph Hellwig <hch@infradead.org>
To: Nick Piggin <npiggin@suse.de>
Cc: Peter Klotz <peter.klotz@aon.at>,
Roman Kononov <kernel@kononov.ftml.net>,
linux-kernel@vger.kernel.org, xfs@oss.sgi.com
Subject: Re: BUG: soft lockup - is this XFS problem?
Date: Sat, 3 Jan 2009 16:44:43 -0500 [thread overview]
Message-ID: <20090103214443.GA6612@infradead.org> (raw)
In-Reply-To: <20081230042333.GC27679@wotan.suse.de>
On Tue, Dec 30, 2008 at 05:23:33AM +0100, Nick Piggin wrote:
> On Tue, Dec 23, 2008 at 12:12:59PM -0500, Christoph Hellwig wrote:
> >
> > Nick, I've seen various reports like this by Roman. It seems to be
> > caused by an interaction of the lockless pagecache with the xfs
> > I/O code. Any idea what might be wrong here:
>
> Hmm, it could get into a loop here if there is a page in the pagecache
> with a zero refcount, which might be a problem with XFS... other looping
> conditions might indicate a problem iwth lockless pagecache or radix
> tree. It would be very helpful to know what condition it is looping on...
See http://oss.sgi.com/bugzilla/show_bug.cgi?id=805
WARNING: multiple messages have this Message-ID (diff)
From: Christoph Hellwig <hch@infradead.org>
To: Nick Piggin <npiggin@suse.de>
Cc: Peter Klotz <peter.klotz@aon.at>,
linux-kernel@vger.kernel.org,
Roman Kononov <kernel@kononov.ftml.net>,
xfs@oss.sgi.com
Subject: Re: BUG: soft lockup - is this XFS problem?
Date: Sat, 3 Jan 2009 16:44:43 -0500 [thread overview]
Message-ID: <20090103214443.GA6612@infradead.org> (raw)
In-Reply-To: <20081230042333.GC27679@wotan.suse.de>
On Tue, Dec 30, 2008 at 05:23:33AM +0100, Nick Piggin wrote:
> On Tue, Dec 23, 2008 at 12:12:59PM -0500, Christoph Hellwig wrote:
> >
> > Nick, I've seen various reports like this by Roman. It seems to be
> > caused by an interaction of the lockless pagecache with the xfs
> > I/O code. Any idea what might be wrong here:
>
> Hmm, it could get into a loop here if there is a page in the pagecache
> with a zero refcount, which might be a problem with XFS... other looping
> conditions might indicate a problem iwth lockless pagecache or radix
> tree. It would be very helpful to know what condition it is looping on...
See http://oss.sgi.com/bugzilla/show_bug.cgi?id=805
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next prev parent reply other threads:[~2009-01-03 21:45 UTC|newest]
Thread overview: 74+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-12-19 6:59 BUG: soft lockup - is this XFS problem? Roman Kononov
2008-12-23 17:12 ` Christoph Hellwig
2008-12-23 17:12 ` Christoph Hellwig
2008-12-30 4:23 ` Nick Piggin
2008-12-30 4:23 ` Nick Piggin
2009-01-03 21:44 ` Christoph Hellwig [this message]
2009-01-03 21:44 ` Christoph Hellwig
2009-01-05 1:48 ` Nick Piggin
2009-01-05 1:48 ` Nick Piggin
2009-01-05 4:19 ` Nick Piggin
2009-01-05 4:19 ` Nick Piggin
2009-01-05 6:48 ` Nick Piggin
2009-01-05 6:48 ` Nick Piggin
2009-01-05 14:25 ` Roman Kononov
2009-01-05 14:25 ` Roman Kononov
2009-01-05 16:21 ` Peter Klotz
2009-01-05 16:21 ` Peter Klotz
2009-01-05 16:41 ` [patch] mm: fix lockless pagecache reordering bug (was Re: BUG: soft lockup - is this XFS problem?) Nick Piggin
2009-01-05 16:41 ` Nick Piggin
2009-01-05 16:41 ` Nick Piggin
2009-01-05 17:30 ` Linus Torvalds
2009-01-05 17:30 ` Linus Torvalds
2009-01-05 17:30 ` Linus Torvalds
2009-01-05 18:00 ` Nick Piggin
2009-01-05 18:00 ` Nick Piggin
2009-01-05 18:00 ` Nick Piggin
2009-01-05 18:44 ` Linus Torvalds
2009-01-05 18:44 ` Linus Torvalds
2009-01-05 18:44 ` Linus Torvalds
2009-01-05 19:39 ` Linus Torvalds
2009-01-05 19:39 ` Linus Torvalds
2009-01-05 19:39 ` Linus Torvalds
2009-01-06 17:17 ` Paul E. McKenney
2009-01-06 17:17 ` Paul E. McKenney
2009-01-06 17:17 ` Paul E. McKenney
2009-01-05 20:12 ` Paul E. McKenney
2009-01-05 20:12 ` Paul E. McKenney
2009-01-05 20:12 ` Paul E. McKenney
2009-01-05 20:39 ` Linus Torvalds
2009-01-05 20:39 ` Linus Torvalds
2009-01-05 20:39 ` Linus Torvalds
2009-01-05 21:57 ` Paul E. McKenney
2009-01-05 21:57 ` Paul E. McKenney
2009-01-05 21:57 ` Paul E. McKenney
2009-01-06 2:05 ` Nick Piggin
2009-01-06 2:05 ` Nick Piggin
2009-01-06 2:05 ` Nick Piggin
2009-01-06 2:23 ` Paul E. McKenney
2009-01-06 2:23 ` Paul E. McKenney
2009-01-06 2:23 ` Paul E. McKenney
2009-01-06 2:29 ` Linus Torvalds
2009-01-06 2:29 ` Linus Torvalds
2009-01-06 2:29 ` Linus Torvalds
2009-01-06 8:38 ` Peter Klotz
2009-01-06 8:38 ` Peter Klotz
2009-01-06 8:38 ` Peter Klotz
2009-01-06 8:43 ` Nick Piggin
2009-01-06 8:43 ` Nick Piggin
2009-01-06 8:43 ` Nick Piggin
2009-01-06 16:16 ` Roman Kononov
2009-01-06 16:16 ` Roman Kononov
2009-01-06 16:16 ` Roman Kononov
2009-01-05 21:04 ` [patch] mm: fix lockless pagecache reordering bug (was Peter Zijlstra
2009-01-05 21:04 ` Peter Zijlstra
2009-01-05 21:04 ` Peter Zijlstra
2009-01-05 21:58 ` Paul E. McKenney
2009-01-05 21:58 ` Paul E. McKenney
2009-01-05 21:58 ` Paul E. McKenney
2011-07-14 11:23 ` BUG: soft lockup - is this XFS problem? Guus Sliepen
2011-07-14 11:23 ` Guus Sliepen
2011-07-14 18:03 ` Peter Klotz
2011-07-14 18:03 ` Peter Klotz
2011-07-14 19:29 ` Guus Sliepen
2011-07-14 19:29 ` Guus Sliepen
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