From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-wi0-f171.google.com (mail-wi0-f171.google.com [209.85.212.171]) by kanga.kvack.org (Postfix) with ESMTP id 1ACD66B004D for ; Tue, 22 Jul 2014 07:15:10 -0400 (EDT) Received: by mail-wi0-f171.google.com with SMTP id hi2so5723288wib.16 for ; Tue, 22 Jul 2014 04:15:09 -0700 (PDT) Received: from mail-wi0-x231.google.com (mail-wi0-x231.google.com [2a00:1450:400c:c05::231]) by mx.google.com with ESMTPS id g18si26800632wiv.106.2014.07.22.04.15.07 for (version=TLSv1 cipher=ECDHE-RSA-RC4-SHA bits=128/128); Tue, 22 Jul 2014 04:15:07 -0700 (PDT) Received: by mail-wi0-f177.google.com with SMTP id ho1so179536wib.4 for ; Tue, 22 Jul 2014 04:15:07 -0700 (PDT) Date: Tue, 22 Jul 2014 13:15:16 +0200 From: Daniel Vetter Subject: Re: [PATCH v2 00/25] AMDKFD kernel driver Message-ID: <20140722111515.GJ15237@phenom.ffwll.local> References: <20140721155851.GB4519@gmail.com> <20140721170546.GB15237@phenom.ffwll.local> <53CD4DD2.10906@amd.com> <53CD5ED9.2040600@amd.com> <20140721190306.GB5278@gmail.com> <20140722072851.GH15237@phenom.ffwll.local> <53CE1E9C.8020105@amd.com> <53CE346B.1080601@amd.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <53CE346B.1080601@amd.com> Sender: owner-linux-mm@kvack.org List-ID: To: Oded Gabbay Cc: Daniel Vetter , Jerome Glisse , Christian =?iso-8859-1?Q?K=F6nig?= , David Airlie , Alex Deucher , Andrew Morton , John Bridgman , Joerg Roedel , Andrew Lewycky , Michel =?iso-8859-1?Q?D=E4nzer?= , Ben Goz , Alexey Skidanov , "linux-kernel@vger.kernel.org" , "dri-devel@lists.freedesktop.org" , linux-mm , "Sellek, Tom" On Tue, Jul 22, 2014 at 12:52:43PM +0300, Oded Gabbay wrote: > On 22/07/14 12:21, Daniel Vetter wrote: > >On Tue, Jul 22, 2014 at 10:19 AM, Oded Gabbay wrote: > >>>Exactly, just prevent userspace from submitting more. And if you have > >>>misbehaving userspace that submits too much, reset the gpu and tell it > >>>that you're sorry but won't schedule any more work. > >> > >>I'm not sure how you intend to know if a userspace misbehaves or not. Can > >>you elaborate ? > > > >Well that's mostly policy, currently in i915 we only have a check for > >hangs, and if userspace hangs a bit too often then we stop it. I guess > >you can do that with the queue unmapping you've describe in reply to > >Jerome's mail. > >-Daniel > > > What do you mean by hang ? Like the tdr mechanism in Windows (checks if a > gpu job takes more than 2 seconds, I think, and if so, terminates the job). Essentially yes. But we also have some hw features to kill jobs quicker, e.g. for media workloads. -Daniel -- Daniel Vetter Software Engineer, Intel Corporation +41 (0) 79 365 57 48 - http://blog.ffwll.ch -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org