From mboxrd@z Thu Jan 1 00:00:00 1970 From: Valdis.Kletnieks@vt.edu Subject: Re: linux-next: zillions of lockdep whinges in include/net/sock.h:1408 Date: Thu, 21 Apr 2016 05:05:55 -0400 Message-ID: <43037.1461229555@turing-police.cc.vt.edu> References: <66816.1461198639@turing-police.cc.vt.edu> <1461224532.4101068.585250481.7A43E285@webmail.messagingengine.com> Mime-Version: 1.0 Content-Type: multipart/signed; boundary="==_Exmh_1461229555_7324P"; micalg=pgp-sha1; protocol="application/pgp-signature" Content-Transfer-Encoding: 7bit Cc: "David S. Miller" , netdev@vger.kernel.org, linux-kernel@vger.kernel.org To: Hannes Frederic Sowa Return-path: In-Reply-To: <1461224532.4101068.585250481.7A43E285@webmail.messagingengine.com> Sender: linux-kernel-owner@vger.kernel.org List-Id: netdev.vger.kernel.org --==_Exmh_1461229555_7324P Content-Type: text/plain; charset=us-ascii On Thu, 21 Apr 2016 09:42:12 +0200, Hannes Frederic Sowa said: > Hi, > > On Thu, Apr 21, 2016, at 02:30, Valdis Kletnieks wrote: > > linux-next 20160420 is whining at an incredible rate - in 20 minutes of > > uptime, I piled up some 41,000 hits from all over the place (cleaned up > > to skip the CPU and PID so the list isn't quite so long): > > Thanks for the report. Can you give me some more details: > > Is this an nfs socket? Do you by accident know if this socket went > through xs_reclassify_socket at any point? We do hold the appropriate > locks at that point but I fear that the lockdep reinitialization > confused lockdep. It wasn't an NFS socket, as NFS wasn't even active at the time. I'm reasonably sure that multiple sockets were in play, given that tcp_v6_rcv and udpv6_queue_rcv_skb were both implicated. I strongly suspect that pretty much any IPv6 traffic could do it - the frequency dropped off quite a bit when I closed firefox, which is usually a heavy network hitter on my laptop. --==_Exmh_1461229555_7324P Content-Type: application/pgp-signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 Comment: Exmh version 2.5 07/13/2001 iQIVAwUBVxiX8wdmEQWDXROgAQLI+RAAkA0dLhdBkySQm5+jK/ZHa0/EyZyopJCA /KoozJ/hEvhheVdrMLfOSw9ratJSyhgxzaJiV2zAM/QB3QT8jzRsgJiK4onyL9Il hVzL4meP4RjHI0tLCkPZ8BdMpwqwoRB3oJM5oS67PyQfFCgvHFmhrOCKRBLWsuAr /2VMVL417MBZ4voLyCYnCJIf6nkx6ZnLmIvz+lOpdFn7y3II8MS/voBy2gJV1KNb /MHT6PzuP19Lwc5fSYv1ciG+FCM1wx6GwqETQUd2abOrM4wfNNKVrTop2tcVBC1p EF1hcWPnkcN1oJelWVc5hwtjdLsnzjtyt158w0Vj1QPIZtdRmuHC8J4C8NX4yhqG mfAmCt2LD08mwscqtNYskEdorfM7pjmXUJ/+MYt04TbYT6fZtWD54eacUd+0zfxV xY9H7W2enKCpFgCSd2Uz1DvTXwU6q+u9k6Pex4JAv4bkdox2Elhn5QcVssFTDFs3 LTiRyu+TSEKBsGWBnF0jiLIINGW14/r0nZ2IjiEOOwrKOu/1tM3Cbh5NOXL1TN9/ tA41P+uK1xjCkH3znIyc1jUjT9bLy7Z9xFzMc5OqocOl5wwJDv1YHRjIqgb4or4q hzm8wGoTVIuLeURnO/Qt39ZuwT+Pklzf+ddCsFxibmOD8bWD/qAScclgm1eX6qpU BUQZr1vRPdM= =E/8B -----END PGP SIGNATURE----- --==_Exmh_1461229555_7324P--