From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751547AbaKFNDN (ORCPT ); Thu, 6 Nov 2014 08:03:13 -0500 Received: from cantor2.suse.de ([195.135.220.15]:49804 "EHLO mx2.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751021AbaKFNDL (ORCPT ); Thu, 6 Nov 2014 08:03:11 -0500 Date: Thu, 6 Nov 2014 14:03:08 +0100 From: Joerg Roedel To: Oded Gabbay Cc: Jesse Barnes , linux-kernel@vger.kernel.org Subject: Re: [PATCH 1/2] mm: export find_extend_vma and handle_mm_fault for driver use Message-ID: <20141106130308.GK8354@suse.de> References: <1414179271-7621-1-git-send-email-jbarnes@virtuousgeek.org> <20141027151327.GE9734@suse.de> <544E61A1.7090400@amd.com> <20141027083552.4af5753f@jbarnes-hsw> <5450B472.1020301@amd.com> <20141105120351.GH8354@suse.de> <20141105135109.39ea54fe@jbarnes-hsw> <545B3676.9030609@amd.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <545B3676.9030609@amd.com> User-Agent: Mutt/1.5.21 (2010-09-15) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, Nov 06, 2014 at 10:51:02AM +0200, Oded Gabbay wrote: > Joerg, sorry for the dumb question but what do you mean by "task > accounting for page-faults"? Where is that code in IOMMUv2 driver > now? Linux counts major and minor page-faults for each running task. For the IOMMUv2 driver this was done in the get_user_pages function, at least until I changed the task parameter to NULL. Currently there is no accounting for that in the IOMMUv2 driver. Joerg