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=-5.9 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,NICE_REPLY_A,SPF_HELO_NONE, SPF_PASS,USER_AGENT_SANE_1 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 F31EEC4708F for ; Wed, 2 Jun 2021 08:09:12 +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 5F4AE613D0 for ; Wed, 2 Jun 2021 08:09:10 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 5F4AE613D0 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=daenzer.net 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 B351D6EB79; Wed, 2 Jun 2021 08:09:06 +0000 (UTC) Received: from netline-mail3.netline.ch (mail.netline.ch [148.251.143.180]) by gabe.freedesktop.org (Postfix) with ESMTP id 67D656EB75; Wed, 2 Jun 2021 08:09:05 +0000 (UTC) Received: from localhost (localhost [127.0.0.1]) by netline-mail3.netline.ch (Postfix) with ESMTP id 60E4C20201C; Wed, 2 Jun 2021 10:09:04 +0200 (CEST) X-Virus-Scanned: Debian amavisd-new at netline-mail3.netline.ch Received: from netline-mail3.netline.ch ([127.0.0.1]) by localhost (netline-mail3.netline.ch [127.0.0.1]) (amavisd-new, port 10024) with LMTP id Fmj8wpSck2lY; Wed, 2 Jun 2021 10:09:04 +0200 (CEST) Received: from thor (24.99.2.85.dynamic.wline.res.cust.swisscom.ch [85.2.99.24]) by netline-mail3.netline.ch (Postfix) with ESMTPA id E0D0220201A; Wed, 2 Jun 2021 10:09:03 +0200 (CEST) Received: from [::1] by thor with esmtp (Exim 4.94.2) (envelope-from ) id 1loLvy-001wmH-1G; Wed, 02 Jun 2021 10:09:02 +0200 From: =?UTF-8?Q?Michel_D=c3=a4nzer?= To: =?UTF-8?Q?Christian_K=c3=b6nig?= , =?UTF-8?B?TWFyZWsgT2zFocOhaw==?= , dri-devel , ML Mesa-dev , Alex Deucher , Daniel Vetter , Dave Airlie , Jason Ekstrand , Bas Nieuwenhuizen References: <327e4008-b29f-f5b7-bb30-532fa52c797f@gmail.com> <7f19e3c7-b6b2-5200-95eb-3fed8d22a6b3@daenzer.net> Subject: Re: Linux Graphics Next: Userspace submission update Message-ID: Date: Wed, 2 Jun 2021 10:09:01 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.10.0 MIME-Version: 1.0 In-Reply-To: <7f19e3c7-b6b2-5200-95eb-3fed8d22a6b3@daenzer.net> Content-Type: text/plain; charset=utf-8 Content-Language: en-CA Content-Transfer-Encoding: 8bit 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: , Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" On 2021-06-01 12:49 p.m., Michel Dänzer wrote: > On 2021-06-01 12:21 p.m., Christian König wrote: > >> Another question is if that is sufficient as security for the display server or if we need further handling down the road? I mean essentially we are moving the reliability problem into the display server. > > Good question. This should generally protect the display server from freezing due to client fences never signalling, but there might still be corner cases. E.g. a client might be able to sneak in a fence between when the compositor checks fences and when it submits its drawing to the kernel. -- Earthling Michel Dänzer | https://redhat.com Libre software enthusiast | Mesa and X developer