Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756615AbaGWHbx (ORCPT ); Wed, 23 Jul 2014 03:31:53 -0400 Received: from mail-ig0-f180.google.com ([209.85.213.180]:37684 "EHLO mail-ig0-f180.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751432AbaGWHbw convert rfc822-to-8bit (ORCPT ); Wed, 23 Jul 2014 03:31:52 -0400 MIME-Version: 1.0 X-Originating-IP: [84.73.67.144] In-Reply-To: <53CF63C2.7070407@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> Date: Wed, 23 Jul 2014 09:31:51 +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 9:26 AM, Christian König wrote: > It's not a locking problem I'm talking about here. Radeons lockup handling > kicks in when anything calls into the driver from the outside, if you have a > fence wait function that's called from the outside but doesn't handle > lockups you essentially rely on somebody else calling another radeon > function for the lockup to be resolved. So you don't have a timer in radeon that periodically checks whether progress is still being made? That's the approach we're using in i915, together with some tricks to kick any stuck waiters so that we can reliably step in and grab locks for the reset. -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/