From: u.kleine-koenig@pengutronix.de (Uwe Kleine-König)
To: linux-arm-kernel@lists.infradead.org
Subject: BUG: spinlock recursion (sys_chdir, user_path_at, do_path_lookup ...)
Date: Thu, 13 Jan 2011 09:09:27 +0100 [thread overview]
Message-ID: <20110113080927.GN24920@pengutronix.de> (raw)
In-Reply-To: <alpine.LFD.2.00.1101122344500.2678@localhost6.localdomain6>
Hi Nick,
On Wed, Jan 12, 2011 at 11:52:01PM +0100, Thomas Gleixner wrote:
> On Wed, 12 Jan 2011, Uwe Kleine-K?nig wrote:
> > > Reverting: fs: rcu-walk aware d_revalidate method
> > > commit: 34286d6662308d82aed891852d04c7c3a2649b16
> > I found that one, too, in the meantime. Currently debugging that with
> > tglx on irc.
>
> The last finding is that parent and dentry in
> nameidata_dentry_drop_rcu() are the same, which explains the lock
> recursion nicely.
>
> @nick: Anything you want us to add to the debugging ?
If that helps, the chdir is to / (probably while being already in /).
Maybe the problem is that "/." == "/.."?
Best regards
Uwe
--
Pengutronix e.K. | Uwe Kleine-K?nig |
Industrial Linux Solutions | http://www.pengutronix.de/ |
next prev parent reply other threads:[~2011-01-13 8:09 UTC|newest]
Thread overview: 29+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-01-12 20:59 BUG: spinlock recursion (sys_chdir, user_path_at, do_path_lookup ...) Ramirez Luna, Omar
2011-01-12 21:02 ` Uwe Kleine-König
2011-01-12 21:16 ` Ramirez Luna, Omar
2011-01-12 22:52 ` Thomas Gleixner
2011-01-13 8:09 ` Uwe Kleine-König [this message]
2011-01-13 11:01 ` Peter Zijlstra
2011-01-13 11:17 ` Peter Zijlstra
2011-01-13 11:21 ` Thomas Gleixner
2011-01-13 11:37 ` Peter Zijlstra
-- strict thread matches above, loose matches on Subject: below --
2011-01-11 11:05 Uwe Kleine-König
2011-01-11 11:05 ` Uwe Kleine-König
2011-01-12 7:52 ` Uwe Kleine-König
2011-01-12 7:52 ` Uwe Kleine-König
2011-01-12 10:57 ` Thomas Gleixner
2011-01-12 10:57 ` Thomas Gleixner
2011-01-12 12:03 ` Uwe Kleine-König
2011-01-12 12:03 ` Uwe Kleine-König
2011-01-12 12:35 ` Russell King - ARM Linux
2011-01-12 12:35 ` Russell King - ARM Linux
2011-01-12 12:48 ` Russell King - ARM Linux
2011-01-12 12:48 ` Russell King - ARM Linux
2011-01-12 12:56 ` Thomas Gleixner
2011-01-12 12:56 ` Thomas Gleixner
2011-01-18 16:59 ` Maciej Rutecki
2011-01-18 16:59 ` Maciej Rutecki
2011-01-18 22:19 ` Nick Piggin
2011-01-18 22:19 ` Nick Piggin
2011-01-19 7:43 ` Uwe Kleine-König
2011-01-19 7:43 ` Uwe Kleine-König
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