From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932729AbYEIQ0h (ORCPT ); Fri, 9 May 2008 12:26:37 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1756403AbYEIQ02 (ORCPT ); Fri, 9 May 2008 12:26:28 -0400 Received: from wf-out-1314.google.com ([209.85.200.168]:35403 "EHLO wf-out-1314.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756254AbYEIQ00 (ORCPT ); Fri, 9 May 2008 12:26:26 -0400 DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=message-id:date:from:to:subject:cc:in-reply-to:mime-version:content-type:content-transfer-encoding:content-disposition:references; b=arpFiYsSSPG4hYrbNxRFpe69tjI4bSJjl/8Bel/WKjmfa4CMvA4FdfHb1iBOeiNcSEZVLTreMsMpBOpqx9RCix4/IFw+wZ1YcWhmVr/+WFr+fDB9W2UbRo3Eq6vVvbP4wrZMYAWmY/5ijZ4usxWIelL+4JD7H4AC6fOMAOMupnQ= Message-ID: <5d6222a80805090926v5baeb9ebw6b4dda98548a2933@mail.gmail.com> Date: Fri, 9 May 2008 13:26:23 -0300 From: "Glauber Costa" To: "Hugh Dickins" Subject: Re: Possible regression? 2.6.26-rc1: T61s failure after suspend/resume Cc: "Theodore Ts'o" , "Glauber Costa" , "Ingo Molnar" , "Carlos R. Mafra" , linux-kernel@vger.kernel.org In-Reply-To: MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Content-Disposition: inline References: <5d6222a80805090828j1a1af054y547640c3408bca1b@mail.gmail.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Fri, May 9, 2008 at 1:21 PM, Hugh Dickins wrote: > On Fri, 9 May 2008, Glauber Costa wrote: > > > > I can't reproduce it neither, and looking at the code over and over > > again, see no obvious point for the breakage. I'll try to reproduce it > > myself, > > to see if I can spot something. But correct me if I'm wrong, this is > > all 64-bit machines, right? > > > > I'm stuck with mostly 32-bit hardware, but will give it a try anyway. > > The machine is 64-bit capable (Core2 Duo), but the kernels I'm running > for this are 32-bit, so I doubt that the 64-bitability is relevant. > I'd love to see what happens with a 64-bit kernel, but I never get > back from suspend with it (and that's not a recent regression). > Carlos is also seeing this with a 32-bit kernel (on P4 Xeon with HT). > > Please don't take my git bisection result too seriously: that's where > it led when I fudged things around enough, and treated blank screens > as manifestations of the problem, which very likely they're not > (there's some other bug which makes it very variable how quickly > I resume). And also, I wasn't checking how many cpus came up each > time: I wouldn't be surprised if at some points in your series only > one would come up, which would then look like a "good" point to me. > This is very unlikely. Exactly because I knew problems were likely to arise in such a delicate thing, I was extremely careful to make it not an issue. But yeah, ultimately, it can happen. -- Glauber Costa. "Free as in Freedom" http://glommer.net "The less confident you are, the more serious you have to act."