From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-3.7 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id AB8EDC56201 for ; Thu, 19 Nov 2020 20:32:27 +0000 (UTC) Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 546652222F for ; Thu, 19 Nov 2020 20:32:27 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 546652222F Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=ACULAB.COM Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=dri-devel-bounces@lists.freedesktop.org Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 0A0006E820; Thu, 19 Nov 2020 20:32:09 +0000 (UTC) Received: from eu-smtp-delivery-151.mimecast.com (eu-smtp-delivery-151.mimecast.com [207.82.80.151]) by gabe.freedesktop.org (Postfix) with ESMTPS id 1EC2189A8B for ; Thu, 19 Nov 2020 09:31:02 +0000 (UTC) Received: from AcuMS.aculab.com (156.67.243.126 [156.67.243.126]) (Using TLS) by relay.mimecast.com with ESMTP id uk-mta-220--Y-lcYUAMEG_EoAlzMORdQ-1; Thu, 19 Nov 2020 09:30:57 +0000 X-MC-Unique: -Y-lcYUAMEG_EoAlzMORdQ-1 Received: from AcuMS.Aculab.com (fd9f:af1c:a25b:0:43c:695e:880f:8750) by AcuMS.aculab.com (fd9f:af1c:a25b:0:43c:695e:880f:8750) with Microsoft SMTP Server (TLS) id 15.0.1347.2; Thu, 19 Nov 2020 09:30:56 +0000 Received: from AcuMS.Aculab.com ([fe80::43c:695e:880f:8750]) by AcuMS.aculab.com ([fe80::43c:695e:880f:8750%12]) with mapi id 15.00.1347.000; Thu, 19 Nov 2020 09:30:56 +0000 From: David Laight To: 'Dave Airlie' , Daniel Vetter Subject: RE: Linux 5.10-rc4 Thread-Topic: Linux 5.10-rc4 Thread-Index: AQHWu7P6i7HOJgcGCEellKywj802qKnNzjYQgAB+qGeAACacEIAAOFJJgACIcRA= Date: Thu, 19 Nov 2020 09:30:56 +0000 Message-ID: <886a1e597e784b42a0fd490b85aa4936@AcuMS.aculab.com> References: <692820a49ded436591b5fe3a18c68a5e@AcuMS.aculab.com> <0a10da3d-085f-c7a7-0053-dc1e9ea871ed@suse.de> In-Reply-To: Accept-Language: en-GB, en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-ms-exchange-transport-fromentityheader: Hosted x-originating-ip: [10.202.205.107] MIME-Version: 1.0 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=C51A453 smtp.mailfrom=david.laight@aculab.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: aculab.com Content-Language: en-US X-Mailman-Approved-At: Thu, 19 Nov 2020 20:32:07 +0000 X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Linux Kernel Mailing List , dri-devel , "Huang, Ray" , Thomas Zimmermann , Dave Airlie , Linus Torvalds , =?utf-8?B?Q2hyaXN0aWFuIEvDtm5pZw==?= Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" From: Dave Airlie > Sent: 19 November 2020 01:16 > > On Thu, 19 Nov 2020 at 08:25, Dave Airlie wrote: > > > > On Thu, 19 Nov 2020 at 08:15, Daniel Vetter wrote: > > > > > > On Wed, Nov 18, 2020 at 11:01 PM David Laight wrote: > > > > > > > > From: Thomas Zimmermann > > > > > Sent: 18 November 2020 19:37 > > > > > > > > > > Hi > > > > > > > > > > Am 18.11.20 um 19:10 schrieb Linus Torvalds: > > > > > > On Wed, Nov 18, 2020 at 4:12 AM David Laight wrote: > > > > > >> > > > > > >> I've got the 'splat' below during boot. > > > > > >> This is an 8-core C2758 Atom cpu using the on-board/cpu graphics. > > > > > >> User space is Ubuntu 20.04. > > > > > >> > > > > > >> Additionally the X display has all the colours and alignment slightly > > > > > >> messed up. > > > > > >> 5.9.0 was ok. > > > > > >> I'm just guessing the two issues are related. > > > > > > > > > > > > Sounds likely. But it would be lovely if you could bisect when > > > > > > exactly the problem(s) started to both verify that, and just to > > > > > > pinpoint the exact change.. > > > > > > > > I don't quite understand what 'git bisect' did. > > > > I was bisecting between v5.9 and v5.10-rc1 but it suddenly started > > > > generating v5.9.0-rc5+ kernels. > > > > > > We queue up patches for -rc1 way before the previous kernel is > > > released, so this is normal. > > > > > > > The identified commit was 13a8f46d803 drm/ttm: move ghost object created. > > > > (retyped - hope it is right). > > > > But the diff to that last 'good' commit is massive. > > > > > > Yeah that's also normal for non-linear history. If you want to > > > double-check, re-test the parent of that commit (which is 2ee476f77ffe > > > ("drm/ttm: add a simple assign mem to bo wrapper")), which should > > > work, and then the bad commit. > > > > > > Also is this the first bad commit for both the splat and the screen > > > corruption issues? > > > > > > > So I don't know if that is anywhere near right. > > > > > > Thomas guessed it could be a ttm change, you hit one, and it looks > > > like it could be the culprit. Now I guess it's up to Dave. Also adding > > > Christian, in case he has an idea. > > > > I'd be mildly surprised if it's that commit, since it just refactors > > what looks to me to be two identical code pieces into one instance > > (within the scope of me screwing that up, but reading it I can't see > > it). > > > > I'll dig into this today. > > https://patchwork.freedesktop.org/patch/401559/ > > should fix it. Nope, and probably not relevant. pl_flags is 2 or 3 and it is testing for 4. The oldest kernel doesn't generate the 'splat' either. Just the f*cked up display output. I'll put a screenshot (photo) into another email. David - Registered Address Lakeside, Bramley Road, Mount Farm, Milton Keynes, MK1 1PT, UK Registration No: 1397386 (Wales) _______________________________________________ dri-devel mailing list dri-devel@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/dri-devel