From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail6.bemta7.messagelabs.com (mail6.bemta7.messagelabs.com [216.82.255.55]) by kanga.kvack.org (Postfix) with ESMTP id E89156B0069 for ; Tue, 22 Nov 2011 10:02:32 -0500 (EST) Date: Tue, 22 Nov 2011 09:02:27 -0600 (CST) From: Christoph Lameter Subject: Re: WARNING: at mm/slub.c:3357, kernel BUG at mm/slub.c:3413 In-Reply-To: <1321973567.2474.17.camel@edumazet-HP-Compaq-6005-Pro-SFF-PC> Message-ID: References: <20111121161036.GA1679@x4.trippels.de> <1321894353.10470.19.camel@edumazet-HP-Compaq-6005-Pro-SFF-PC> <1321895706.10470.21.camel@edumazet-HP-Compaq-6005-Pro-SFF-PC> <20111121173556.GA1673@x4.trippels.de> <1321900743.10470.31.camel@edumazet-HP-Compaq-6005-Pro-SFF-PC> <20111121185215.GA1673@x4.trippels.de> <20111121195113.GA1678@x4.trippels.de> <1321907275.13860.12.camel@pasglop> <20111122084513.GA1688@x4.trippels.de> <1321954729.2474.4.camel@edumazet-HP-Compaq-6005-Pro-SFF-PC> <1321955185.2474.6.camel@edumazet-HP-Compaq-6005-Pro-SFF-PC> <1321973567.2474.17.camel@edumazet-HP-Compaq-6005-Pro-SFF-PC> MIME-Version: 1.0 Content-Type: MULTIPART/MIXED; BOUNDARY="-1463811839-315387018-1321974150=:25785" Sender: owner-linux-mm@kvack.org List-ID: To: Eric Dumazet Cc: Markus Trippelsdorf , Christian Kujau , Benjamin Herrenschmidt , "Alex,Shi" , "linux-kernel@vger.kernel.org" , "linux-mm@kvack.org" , Pekka Enberg , Matt Mackall , "netdev@vger.kernel.org" , Tejun Heo This message is in MIME format. The first part should be readable text, while the remaining parts are likely unreadable without MIME-aware tools. ---1463811839-315387018-1321974150=:25785 Content-Type: TEXT/PLAIN; charset=UTF-8 Content-Transfer-Encoding: QUOTED-PRINTABLE On Tue, 22 Nov 2011, Eric Dumazet wrote: > Le mardi 22 novembre 2011 =C3=A0 08:46 -0600, Christoph Lameter a =C3=A9c= rit : > > On Tue, 22 Nov 2011, Eric Dumazet wrote: > > > > > I trigger a bug in less than 10 secondes, with this running while a > > > "make -j16 " kernel build is run. > > > > > > while :; do slabinfo -v; done > > > > Hmm.... Yeah there was limited testing on the debug features. There cou= ld > > be something amiss there. Need to review the validation interactions wi= th > > the new code. > > > > > > Hmm... yes, we probably should take a look. Allright there is an obvious issue if debugging is off since the lockless paths do not take the page lock in that case but the validation logic does. Did you run the test with debugging on or off? Not sure what the solution is but the simplest would be to disable validation if lockless is active. ---1463811839-315387018-1321974150=:25785-- -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Fight unfair telecom internet charges in Canada: sign http://stopthemeter.ca/ Don't email: email@kvack.org