netdev - Re: Linux 3.1-rc9

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Message-ID: <20111102221023.GA27457@home.goodmis.org>
Date:	Wed, 2 Nov 2011 18:10:23 -0400
From:	Steven Rostedt <rostedt@...dmis.org>
To:	Simon Kirby <sim@...tway.ca>
Cc:	Thomas Gleixner <tglx@...utronix.de>,
	David Miller <davem@...emloft.net>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Dave Jones <davej@...hat.com>,
	Martin Schwidefsky <schwidefsky@...ibm.com>,
	Ingo Molnar <mingo@...e.hu>,
	Network Development <netdev@...r.kernel.org>
Subject: Re: Linux 3.1-rc9

Thomas pointed me here.

On Mon, Oct 31, 2011 at 10:32:46AM -0700, Simon Kirby wrote:
> [104661.244767] 
> [104661.244767]  Possible unsafe locking scenario:
> [104661.244767]        
> [104661.244767]        CPU0                    CPU1
> [104661.244767]        ----                    ----
> [104661.244767]   lock(slock-AF_INET);
> [104661.244767]                                lock(slock-AF_INET);
> [104661.244767]                                lock(slock-AF_INET);
> [104661.244767]   lock(slock-AF_INET);
> [104661.244767] 
> [104661.244767]  *** DEADLOCK ***
> [104661.244767] 

Bah, I used the __print_lock_name() function to show the lock names in
the above, which leaves off the subclass number. I'll go write up a
patch that fixes that.

Thanks,

-- Steve

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