Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753157Ab2E3Lj2 (ORCPT ); Wed, 30 May 2012 07:39:28 -0400 Received: from mail-lb0-f174.google.com ([209.85.217.174]:61098 "EHLO mail-lb0-f174.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751738Ab2E3Lj0 (ORCPT ); Wed, 30 May 2012 07:39:26 -0400 Message-ID: <4FC606E7.4090701@openvz.org> Date: Wed, 30 May 2012 15:39:19 +0400 From: Konstantin Khlebnikov User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:10.0.4) Gecko/20120517 Firefox/10.0.4 Iceape/2.7.4 MIME-Version: 1.0 To: Martin Mokrejs CC: Andrew Morton , Oleg Nesterov , LKML , "markus@trippelsdorf.de" , "hughd@google.com" , "kamezawa.hiroyu@jp.fujitsu.com" , Michal Hocko , "linux-mm@kvack.org" Subject: Re: 3.4-rc7: BUG: Bad rss-counter state mm:ffff88040b56f800 idx:1 val:-59 References: <4FBC1618.5010408@fold.natur.cuni.cz> <20120522162835.c193c8e0.akpm@linux-foundation.org> <20120522162946.2afcdb50.akpm@linux-foundation.org> <20120523172146.GA27598@redhat.com> <4FC52F17.20709@openvz.org> <20120529132658.14ab9ba3.akpm@linux-foundation.org> <4FC546B1.8050508@fold.natur.cuni.cz> In-Reply-To: <4FC546B1.8050508@fold.natur.cuni.cz> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1878 Lines: 57 Martin Mokrejs wrote: > Andrew Morton wrote: >> On Wed, 30 May 2012 00:18:31 +0400 >> Konstantin Khlebnikov wrote: >> >>> Oleg Nesterov wrote: >>>> On 05/22, Andrew Morton wrote: >>>>> >>>>> Also, I have a note here that Oleg was unhappy with the patch. Oleg >>>>> happiness is important. Has he cheered up yet? >>>> >>>> Well, yes, I do not really like this patch ;) Because I think there is >>>> a more simple/straightforward fix, see below. In my opinion it also >>>> makes the original code simpler. >>>> >>>> But. Obviously this is subjective, I can't prove my patch is "better", >>>> and I didn't try to test it. >>>> >>>> So I won't argue with Konstantin who dislikes my patch, although I >>>> would like to know the reason. >>> >>> I don't remember why I dislike your patch. >>> For now I can only say ACK ) >> >> We'll need a changelogged signed-off patch, please Oleg. And some evidence >> that it was tested would be nice ;) > > I will reboot in few hours, finally after few days ... I am running this first > patch. I will try to test the second/alternative patch more quickly. Sorry for > the delay. > easiest way trigger this bug: #define _GNU_SOURCE #include #include #include #include static inline int sys_clone(unsigned long flags, void *stack, int *ptid, int *ctid) { return syscall(SYS_clone, flags, stack, ptid, ctid); } int main(int argc, char **argv) { void *page; page = mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0); sys_clone(CLONE_VFORK | CLONE_VM | CLONE_CHILD_CLEARTID, NULL, NULL, page); } -- 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/