Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757214AbaGWIHU (ORCPT ); Wed, 23 Jul 2014 04:07:20 -0400 Received: from mail-ie0-f170.google.com ([209.85.223.170]:36002 "EHLO mail-ie0-f170.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752640AbaGWIHK convert rfc822-to-8bit (ORCPT ); Wed, 23 Jul 2014 04:07:10 -0400 MIME-Version: 1.0 X-Originating-IP: [84.73.67.144] In-Reply-To: <53CF6B18.5070107@vodafone.de> References: <20140709093124.11354.3774.stgit@patser> <20140709122953.11354.46381.stgit@patser> <53CE2421.5040906@amd.com> <20140722114607.GL15237@phenom.ffwll.local> <20140722115737.GN15237@phenom.ffwll.local> <53CE56ED.4040109@vodafone.de> <20140722132652.GO15237@phenom.ffwll.local> <53CE6AFA.1060807@vodafone.de> <53CE84AA.9030703@amd.com> <53CE8A57.2000803@vodafone.de> <53CF58FB.8070609@canonical.com> <53CF5B9F.1050800@amd.com> <53CF5EFE.6070307@canonical.com> <53CF63C2.7070407@vodafone.de> <53CF6622.6060803@amd.com> <53CF699D.9070902@canonical.com> <53CF6B18.5070107@vodafone.de> Date: Wed, 23 Jul 2014 10:07:09 +0200 Message-ID: Subject: Re: [Nouveau] [PATCH 09/17] drm/radeon: use common fence implementation for fences From: Daniel Vetter To: =?UTF-8?Q?Christian_K=C3=B6nig?= Cc: Maarten Lankhorst , =?UTF-8?Q?Christian_K=C3=B6nig?= , Thomas Hellstrom , nouveau , LKML , dri-devel , Ben Skeggs , "Deucher, Alexander" Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8BIT Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, Jul 23, 2014 at 9:58 AM, Christian König wrote: > Just imagine an application using prime is locking up Radeon and because of > that gets killed by the user. Nothing else in the system would use the > Radeon hardware any more and so radeon gets only called by another driver > waiting patiently for radeon to finish rendering which never happens because > the whole thing is locked up and we don't get a chance to recover. But isn't that possible already without fences? X hangs radeon, user crashes X for unrelated reasons before radeon will notice the hang. Then no one uses radeon any longer and the hang stays undetected. -Daniel -- Daniel Vetter Software Engineer, Intel Corporation +41 (0) 79 365 57 48 - http://blog.ffwll.ch -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/