From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751598Ab0CUPhu (ORCPT ); Sun, 21 Mar 2010 11:37:50 -0400 Received: from mail-fx0-f221.google.com ([209.85.220.221]:59820 "EHLO mail-fx0-f221.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751299Ab0CUPhs (ORCPT ); Sun, 21 Mar 2010 11:37:48 -0400 X-Greylist: delayed 446 seconds by postgrey-1.27 at vger.kernel.org; Sun, 21 Mar 2010 11:37:48 EDT DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :content-type; b=c/V+aErmz2JDvIC85iWmeL0sJ1vHROzFr23JazawoiRe/lAvBYqUHJwbDsmgQo2AKw agzhjWqGGvABcKSaBonkKuvlNRl6qjSOwks8mmDxC9p4tR4pu66XJgNxGBbfnzqHBCSe kOjtoPiYP253YoQVa/yk/bIKsMwD+gQOteSwI= MIME-Version: 1.0 In-Reply-To: <20100321135836.GA11661@zhen-devel.sh.intel.com> References: <1268258994.2183.14.camel@carter> <20100311083404.GG6896@zhen-devel.sh.intel.com> <20100319132723.118cc16a.akpm@linux-foundation.org> <20100321135836.GA11661@zhen-devel.sh.intel.com> Date: Sun, 21 Mar 2010 16:30:20 +0100 Message-ID: Subject: Re: [PATCH] intel-agp.c: Fix crash when accessing nonexistent GTT entries in i915 From: Miguel Ojeda To: Zhenyu Wang , Miguel Ojeda , Andrew Morton , linux-kernel@vger.kernel.org, David.Woodhouse@intel.com, dwmw2@infradead.org, eric@anholt.net, ben@decadent.org.uk, gregkh@suse.de Content-Type: text/plain; charset=ISO-8859-1 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Sun, Mar 21, 2010 at 2:58 PM, Zhenyu Wang wrote: > On 2010.03.20 14:04:56 +0100, Miguel Ojeda wrote: >> On Fri, Mar 19, 2010 at 9:27 PM, Andrew Morton >> wrote: >> > On Thu, 11 Mar 2010 16:54:26 +0100 >> > Miguel Ojeda wrote: >> > >> >> Attached dmesg, lspci -vv, config and xorg. >> >> >> >> When the X server crashes, the kernel does not report anything >> > >> > This seems to have gone all quiet? >> >> It seems so, I was about to ping Zhenyu. > > Could you try recent X.org intel driver release? Your failure X log > showed some pretty old UMS driver's render flush time out message, > I think whose version never has been well tested with new kms/gem stuff. > Sure. Debian Stable got version 2.3. >> >> > >> > As this was a 2.6.32->2.6.32.4 regression, I assume that it's also a >> > 2.6.32->2.6.33 regression? >> >> Yep. All kernels I tested since 2.6.32.4 crash, including 2.6.32.10, >> 2.6.33 and 2.6.34-rc1. See my original message for more details about >> the crash. >> > > Could you bisect? I doubt it's caused by David's patch, as if it is, you > will have trouble at early agp init time, instead of current problem looks > like something causing rendering hang..and I can't think of how mapping GTT > to a scratch page could cause problem in case GTT bar is truely 256K. I bisected in order to find the commit 5877960869333e42ebeb733e8d9d5630ff96d350. I don't know if such commit is really the true problem (does not seem so if you are right); however, it is the commit that breaks the X server as I stated in the original message. > > -- > Open Source Technology Center, Intel ltd. > > $gpg --keyserver wwwkeys.pgp.net --recv-keys 4D781827 > > -----BEGIN PGP SIGNATURE----- > Version: GnuPG v1.4.10 (GNU/Linux) > > iEYEARECAAYFAkumJgwACgkQsQQaM014GCe2cgCbB8LJnqn7n7J++lA8Pd+TfBQb > 2BQAn2sYv0DZuSniLTcf9F3cX+cGIgVl > =gQHY > -----END PGP SIGNATURE----- > >