Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754239AbZGAIpG (ORCPT ); Wed, 1 Jul 2009 04:45:06 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1753675AbZGAIoz (ORCPT ); Wed, 1 Jul 2009 04:44:55 -0400 Received: from mx2.redhat.com ([66.187.237.31]:35022 "EHLO mx2.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753027AbZGAIoy (ORCPT ); Wed, 1 Jul 2009 04:44:54 -0400 Date: Wed, 1 Jul 2009 10:44:30 +0200 From: Jiri Olsa To: Herbert Xu Cc: Andi Kleen , netdev@vger.kernel.org, linux-kernel@vger.kernel.org, fbl@redhat.com, nhorman@redhat.com, davem@redhat.com, oleg@redhat.com, eric.dumazet@gmail.com Subject: Re: [PATCH] net: fix race in the receive/select Message-ID: <20090701084430.GC4769@jolsa.lab.eng.brq.redhat.com> References: <87eit3l7y6.fsf@basil.nowhere.org> <20090701033924.GA29762@gondor.apana.org.au> <20090701062732.GK6760@one.firstfloor.org> <20090701070332.GA31103@gondor.apana.org.au> <20090701072226.GN6760@one.firstfloor.org> <20090701083144.GA31863@gondor.apana.org.au> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20090701083144.GA31863@gondor.apana.org.au> User-Agent: Mutt/1.5.19 (2009-01-05) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1105 Lines: 32 On Wed, Jul 01, 2009 at 04:31:44PM +0800, Herbert Xu wrote: > On Wed, Jul 01, 2009 at 09:22:26AM +0200, Andi Kleen wrote: > > > > Agreed. > > > > I suspect the reordering of the wake queue tests might makes a difference, but > > in this case to ensure they are always tested in the proper order by > > the compiler would need more smp_rmb()s > > I just looked up the original bug report and it's against RHEL4 > which is a 2.6.9 kernel. Jiri, have we reproduced this on a more > recent kernel? no, only RHEL 4.. it is very hard to reproduce. I was succesfull once on RHEL4 after 8 days, never on upstream though. jirka > > Thanks, > -- > Visit Openswan at http://www.openswan.org/ > Email: Herbert Xu ~{PmV>HI~} > Home Page: http://gondor.apana.org.au/~herbert/ > PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt -- 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/