From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-pa0-f46.google.com (mail-pa0-f46.google.com [209.85.220.46]) by kanga.kvack.org (Postfix) with ESMTP id 0A9D46B0044 for ; Tue, 22 Jul 2014 05:53:03 -0400 (EDT) Received: by mail-pa0-f46.google.com with SMTP id lj1so11744588pab.33 for ; Tue, 22 Jul 2014 02:53:03 -0700 (PDT) Received: from na01-bn1-obe.outbound.protection.outlook.com (mail-bn1blp0190.outbound.protection.outlook.com. [207.46.163.190]) by mx.google.com with ESMTPS id qc2si8593210pdb.178.2014.07.22.02.53.01 for (version=TLSv1 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Tue, 22 Jul 2014 02:53:01 -0700 (PDT) Message-ID: <53CE346B.1080601@amd.com> Date: Tue, 22 Jul 2014 12:52:43 +0300 From: Oded Gabbay MIME-Version: 1.0 Subject: Re: [PATCH v2 00/25] AMDKFD kernel driver References: <20140720174652.GE3068@gmail.com> <53CD0961.4070505@amd.com> <53CD17FD.3000908@vodafone.de> <20140721152511.GW15237@phenom.ffwll.local> <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> In-Reply-To: Content-Type: text/plain; charset="UTF-8"; format=flowed Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org List-ID: To: Daniel Vetter Cc: Jerome Glisse , =?UTF-8?B?Q2hyaXN0aWFuIEvDtm5pZw==?= , David Airlie , Alex Deucher , Andrew Morton , John Bridgman , Joerg Roedel , Andrew Lewycky , =?UTF-8?B?TWljaGVsIETDpG56ZXI=?= , Ben Goz , Alexey Skidanov , "linux-kernel@vger.kernel.org" , "dri-devel@lists.freedesktop.org" , linux-mm , "Sellek, Tom" 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). Oded -- 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