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From: Ingo Molnar <mingo@elte.hu>
To: Alan Cox <alan@lxorguk.ukuu.org.uk>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>,
	Steven Rostedt <rostedt@goodmis.org>,
	Andrew Morton <akpm@linux-foundation.org>,
	LKML <linux-kernel@vger.kernel.org>
Subject: Re: bug in tty ldisc and friends
Date: Tue, 16 Jun 2009 11:09:37 +0200	[thread overview]
Message-ID: <20090616090937.GE13771@elte.hu> (raw)
In-Reply-To: <20090616095706.36f01282@lxorguk.ukuu.org.uk>


* Alan Cox <alan@lxorguk.ukuu.org.uk> wrote:

> > Hm, have you tried the patch i sent to you that extends the 
> > number-lock-locks-tracked limit you have run into? It is 
> > trivial.
> 
> I tried upping the number of locks a while ago - it has no effect, 
> which checking on irc seems to fit the general pattern of the 
> reports against Fedora.
> 
> The good thing is I trigger this at boot time reliably - so if 
> you've got some debug stuff you want to stick in I can do that

Could you please turn on CONFIG_DEBUG_LOCKDEP=y and after the 
overflow has happened, send us (or upload somewhere) the output of 
"cat /proc/lock*" ?

If we run out of chains then the source of the leak should be 
clearly visible in that debug outpt.

Thanks,

	Ingo

  reply	other threads:[~2009-06-16  9:09 UTC|newest]

Thread overview: 19+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2009-06-16  5:45 bug in tty ldisc and friends Steven Rostedt
2009-06-16  8:37 ` Alan Cox
2009-06-16  8:50   ` Ingo Molnar
2009-06-16  8:57     ` Alan Cox
2009-06-16  9:09       ` Ingo Molnar [this message]
2009-06-16 10:00       ` Ingo Molnar
2009-06-16 10:04         ` Alan Cox
2009-06-16 10:12           ` Ingo Molnar
2009-06-16 10:25             ` Ingo Molnar
2009-06-16 10:29               ` Ingo Molnar
2009-06-16 10:34                 ` Joerg Roedel
2009-06-16 10:45                   ` Ingo Molnar
2009-06-16 10:36                 ` Ingo Molnar
2009-06-16 11:39                   ` Joerg Roedel
2009-06-16 12:11                     ` Ingo Molnar
2009-06-16 15:24                   ` Joerg Roedel
2009-06-17  8:32                   ` Peter Zijlstra
2009-06-17 14:10                     ` Ingo Molnar
2009-06-17 14:28                       ` Joerg Roedel

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