Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758516AbaDKOBz (ORCPT ); Fri, 11 Apr 2014 10:01:55 -0400 Received: from lennier.cc.vt.edu ([198.82.162.213]:51062 "EHLO lennier.cc.vt.edu" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752415AbaDKOBx (ORCPT ); Fri, 11 Apr 2014 10:01:53 -0400 X-Mailer: exmh version 2.8.0 04/21/2012 with nmh-1.5+dev To: Peter Zijlstra Cc: Jason Low , "Kirill A. Shutemov" , "Michael L. Semon" , Ingo Molnar , linux-kernel@vger.kernel.org Subject: Re: 3.14.0+/x86: lockdep and mutexes not getting along In-Reply-To: Your message of "Thu, 10 Apr 2014 16:15:59 +0200." <20140410141559.GE13658@twins.programming.kicks-ass.net> From: Valdis.Kletnieks@vt.edu References: <20140409121940.GA12890@node.dhcp.inet.fi> <1397108579.2586.15.camel@j-VirtualBox> <20140410091824.GL10526@twins.programming.kicks-ass.net> <20140410141559.GE13658@twins.programming.kicks-ass.net> Mime-Version: 1.0 Content-Type: multipart/signed; boundary="==_Exmh_1397224782_3165P"; micalg=pgp-sha1; protocol="application/pgp-signature" Content-Transfer-Encoding: 7bit Date: Fri, 11 Apr 2014 09:59:42 -0400 Message-ID: <3615.1397224782@turing-police.cc.vt.edu> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org --==_Exmh_1397224782_3165P Content-Type: text/plain; charset=us-ascii On Thu, 10 Apr 2014 16:15:59 +0200, Peter Zijlstra said: > On Thu, Apr 10, 2014 at 11:18:24AM +0200, Peter Zijlstra wrote: > > So I managed to reproduce, and the below makes it go away. I just don't > > understand why though. will stare more. > > /me kicks himself.. bloody obvious fail there :-) > > Not unlocking the lock after a lockdep trigger will make things get > stuck real fast :-) > > --- > kernel/locking/mutex-debug.c | 19 +++++++++---------- > 1 file changed, 9 insertions(+), 10 deletions(-) Confirming that this makes next-20140409 boot without hanging for me. Feel free to stick a Tested-by: on it. ;) --==_Exmh_1397224782_3165P Content-Type: application/pgp-signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 Comment: Exmh version 2.5 07/13/2001 iQIVAwUBU0f1TgdmEQWDXROgAQJrWQ/+LtUfovTVLCNbRP7GpidlfJbn33IMVBdZ NyzVNDI9HfT/yIixOm/nJxBnL1YkKMq3INSzujqN1o0BearOkigxAUDImmA2d5ef yGkH8fkW+tUHU0Ydf30ZYsWyXu7xy3SnGUsaibxyBzJ6uaEmm5hhjd38ZmRCz4sm zATiChMsllReunfIWbmzpt6MXjA+bKjzVBTxrBR8OI2nHW1FcguaXQ9zJ2k/rQJV 4z07VmEsJ1//0GuC2dh51fXSMVz/MDed9eYMNMD5DTfsuHmeouS17zLJpNEN1Asv GncOud0JiyRnm5WPKwwkMHCnC/tnu8ZKY/W3B/7GGxYoemVR1cG73Cxl6Mk/sOy2 tVC8STxpTHNAzGjY87av8K95Kf3DD1UFHoQNvTS7jSmzqoWc5m3RRdk+oA+gkjJf qSqOUDnvfRMZ2hZmLW1zgkzQum5Fsky1BOt04GdYT6X2INMxUxvqETeg9KdF75Ek AqfKQULy4qfTWpjPA/ZadGhvQICo8eT6Ao46zhocDKKOg+fZEkCVp+dlwFhTdo6p 4HiIeaJgrX8F2TYkf9lmpxySYL7HSnHGUqsEK4r18zIHPuuON2s/uNe6rk63PzF7 htcTW15em77YvZO9hFOwZpKpZQ4j45IJHlv7se0+2pwtCI8MsxSuVFXN+t6coUF/ MWbdFpV4Yig= =2zaP -----END PGP SIGNATURE----- --==_Exmh_1397224782_3165P-- -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/