Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755088AbYFNTrq (ORCPT ); Sat, 14 Jun 2008 15:47:46 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1754115AbYFNTrg (ORCPT ); Sat, 14 Jun 2008 15:47:36 -0400 Received: from fg-out-1718.google.com ([72.14.220.158]:31050 "EHLO fg-out-1718.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754094AbYFNTrf (ORCPT ); Sat, 14 Jun 2008 15:47:35 -0400 DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=date:from:to:cc:subject:message-id:references:mime-version :content-type:content-disposition:in-reply-to:user-agent; b=G5WLiu0HkLD4I5irMKjObLojGw9mbwMMkzX7JIqMqUlOiOmaJ+U3ouWbZbdpfaL259 5ksI1K7KMDifEgrKtQJIHpH55SBcnQgE0Wh8VyB6FjiSSVmxS3utsL3r+u1SboQ0WUTF wuzTpovmoNBWlZSFBJn2zcAQ9v3RTYlm7GPmI= Date: Sat, 14 Jun 2008 23:43:38 +0400 From: Alexey Dobriyan To: "Paul E. McKenney" Cc: Oleg Nesterov , Adrian Bunk , "Rafael J. Wysocki" , Linux Kernel Mailing List , Linus Torvalds Subject: Re: [Bug #10815] 2.6.26-rc4: RIP find_pid_ns+0x6b/0xa0 Message-ID: <20080614194338.GA4820@martell.zuzino.mipt.ru> References: <20080613135255.GB21341@cs181133002.pp.htv.fi> <20080614144200.GA26421@linux.vnet.ibm.com> <20080614145839.GA10523@tv-sign.ru> <20080614181212.GB26421@linux.vnet.ibm.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20080614181212.GB26421@linux.vnet.ibm.com> User-Agent: Mutt/1.5.16 (2007-06-09) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2184 Lines: 53 On Sat, Jun 14, 2008 at 11:12:12AM -0700, Paul E. McKenney wrote: > On Sat, Jun 14, 2008 at 06:58:39PM +0400, Oleg Nesterov wrote: > > On 06/14, Paul E. McKenney wrote: > > > > > > On Fri, Jun 13, 2008 at 04:52:55PM +0300, Adrian Bunk wrote: > > > > On Sat, Jun 07, 2008 at 10:42:57PM +0200, Rafael J. Wysocki wrote: > > > > > This message has been generated automatically as a part of a report > > > > > of recent regressions. > > > > > > > > > > The following bug entry is on the current list of known regressions > > > > > from 2.6.25. Please verify if it still should be listed. > > > > > > > > > > > > > > > Bug-Entry : http://bugzilla.kernel.org/show_bug.cgi?id=10815 > > > > > Subject : 2.6.26-rc4: RIP find_pid_ns+0x6b/0xa0 > > > > > Submitter : Alexey Dobriyan > > > > > Date : 2008-05-27 09:23 (12 days old) > > > > > References : http://lkml.org/lkml/2008/5/27/9 > > > > > Handled-By : Oleg Nesterov > > > > > Linus Torvalds > > > > > Paul E. McKenney > > > > > Patch : http://lkml.org/lkml/2008/5/28/16 > > > > > > > > What happened with this issue? > > > > > > The patch listed above works for me, passes rcutorture, &c. However, > > > I never have been able to reproduce the original problem, so cannot say > > > whether it qualifies as a fix. > > > > I doubt very much RCU was the reason of this problem. > > Although I very much appreciate your confidence in my code, it is new > code, so therefore under suspicion. > > > Alexey, how did you trigger this problem? > > One of them involved running LTP while doing 170 kernel builds in > parallel. My gut feeling is that find_pid_ns oops, __d_lookup oops and __call_for_each_cic oops are the same bug. And rcutorture failures I've mentioned to Paul privately. Oleg, debugging you've posted never triggered. kerneloops suggests that I'm alone. :-( -- 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/