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=-3.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS 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 AE0F9C433B4 for ; Sun, 16 May 2021 16:06:31 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id B24D561177 for ; Sun, 16 May 2021 16:06:30 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org B24D561177 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=depni.sinp.msu.ru Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id D518F6B0070; Sun, 16 May 2021 12:06:29 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id D01976B0071; Sun, 16 May 2021 12:06:29 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id BA2406B0072; Sun, 16 May 2021 12:06:29 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0113.hostedemail.com [216.40.44.113]) by kanga.kvack.org (Postfix) with ESMTP id 88D526B0070 for ; Sun, 16 May 2021 12:06:29 -0400 (EDT) Received: from smtpin16.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay03.hostedemail.com (Postfix) with ESMTP id 1B0A88249980 for ; Sun, 16 May 2021 16:06:29 +0000 (UTC) X-FDA: 78147571698.16.966EBB2 Received: from depni-mx.sinp.msu.ru (depni-mx.sinp.msu.ru [213.131.7.21]) by imf29.hostedemail.com (Postfix) with ESMTP id 00CB6D5 for ; Sun, 16 May 2021 16:06:26 +0000 (UTC) Received: from spider (ip-95-220-118-46.bb.netbynet.ru [95.220.118.46]) by depni-mx.sinp.msu.ru (Postfix) with ESMTPSA id 9250C1BF457; Sun, 16 May 2021 19:07:24 +0300 (MSK) From: Serge Belyshev To: Christoph Hellwig Cc: Andrew Morton , Jani Nikula , Joonas Lahtinen , Rodrigo Vivi , Peter Zijlstra , Daniel Vetter , intel-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org, Chris Wilson , linux-mm@kvack.org Subject: Re: [PATCH 4/4] i915: fix remap_io_sg to verify the pgprot References: <20210326055505.1424432-1-hch@lst.de> <20210326055505.1424432-5-hch@lst.de> Date: Sun, 16 May 2021 19:06:25 +0300 In-Reply-To: <20210326055505.1424432-5-hch@lst.de> (Christoph Hellwig's message of "Fri, 26 Mar 2021 06:55:05 +0100") Message-ID: <87pmxqiry6.fsf@depni.sinp.msu.ru> User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/28.0.50 (gnu/linux) MIME-Version: 1.0 Content-Type: text/plain Authentication-Results: imf29.hostedemail.com; dkim=none; dmarc=fail reason="No valid SPF, No valid DKIM" header.from=msu.ru (policy=none); spf=none (imf29.hostedemail.com: domain of belyshev@depni.sinp.msu.ru has no SPF policy when checking 213.131.7.21) smtp.mailfrom=belyshev@depni.sinp.msu.ru X-Rspamd-Server: rspam01 X-Rspamd-Queue-Id: 00CB6D5 X-Stat-Signature: ezqafgk3zunyrnxafda1erer61hpmaiy X-HE-Tag: 1621181186-226158 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: I have another problem with this patch since it landed in mainline. On my m3-6Y30 skylake HD Graphics 515 (rev 07), it causes visual artifacts that look like bunch of one pixel high horizontal streaks, seen most often in firefox while scrolling or in menu controls. Reverting this patch on top of current mainline fixes the problem.