Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753648AbdHQVMr (ORCPT ); Thu, 17 Aug 2017 17:12:47 -0400 Received: from mail.linuxfoundation.org ([140.211.169.12]:32848 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753147AbdHQVMq (ORCPT ); Thu, 17 Aug 2017 17:12:46 -0400 Date: Thu, 17 Aug 2017 14:12:45 -0700 From: Andrew Morton To: =?ISO-8859-1?Q?J=E9r=F4me?= Glisse Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org, John Hubbard , Dan Williams , David Nellans , Balbir Singh Subject: Re: [HMM-v25 13/19] mm/migrate: new migrate mode MIGRATE_SYNC_NO_COPY Message-Id: <20170817141245.93cfb315cfc598ff86928639@linux-foundation.org> In-Reply-To: <20170817000548.32038-14-jglisse@redhat.com> References: <20170817000548.32038-1-jglisse@redhat.com> <20170817000548.32038-14-jglisse@redhat.com> X-Mailer: Sylpheed 3.4.1 (GTK+ 2.24.23; x86_64-pc-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 442 Lines: 9 On Wed, 16 Aug 2017 20:05:42 -0400 J__r__me Glisse wrote: > Introduce a new migration mode that allow to offload the copy to > a device DMA engine. This changes the workflow of migration and > not all address_space migratepage callback can support this. So > it needs to be tested in those cases. Can you please expand on this? What additional testing must be performed before we are able to merge this into mainline?