From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-10.3 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, MENTIONS_GIT_HOSTING,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED, USER_AGENT_SANE_1 autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 70A17C33CA1 for ; Sun, 24 Nov 2019 06:15:15 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 44C8720748 for ; Sun, 24 Nov 2019 06:15:15 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=nvidia.com header.i=@nvidia.com header.b="Lxyt3fX3" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1725913AbfKXGPH (ORCPT ); Sun, 24 Nov 2019 01:15:07 -0500 Received: from hqemgate16.nvidia.com ([216.228.121.65]:6579 "EHLO hqemgate16.nvidia.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725810AbfKXGPG (ORCPT ); Sun, 24 Nov 2019 01:15:06 -0500 Received: from hqpgpgate101.nvidia.com (Not Verified[216.228.121.13]) by hqemgate16.nvidia.com (using TLS: TLSv1.2, DES-CBC3-SHA) id ; Sat, 23 Nov 2019 22:15:00 -0800 Received: from hqmail.nvidia.com ([172.20.161.6]) by hqpgpgate101.nvidia.com (PGP Universal service); Sat, 23 Nov 2019 22:14:59 -0800 X-PGP-Universal: processed; by hqpgpgate101.nvidia.com on Sat, 23 Nov 2019 22:14:59 -0800 Received: from [10.110.48.28] (10.124.1.5) by HQMAIL107.nvidia.com (172.20.187.13) with Microsoft SMTP Server (TLS) id 15.0.1473.3; Sun, 24 Nov 2019 06:14:58 +0000 Subject: Re: [PATCH v7 07/24] IB/umem: use get_user_pages_fast() to pin DMA pages To: Jason Gunthorpe , Christoph Hellwig CC: Andrew Morton , Al Viro , Alex Williamson , Benjamin Herrenschmidt , =?UTF-8?B?QmrDtnJuIFTDtnBlbA==?= , Dan Williams , Daniel Vetter , Dave Chinner , David Airlie , "David S . Miller" , Ira Weiny , Jan Kara , Jens Axboe , Jonathan Corbet , =?UTF-8?B?SsOpcsO0bWUgR2xpc3Nl?= , Magnus Karlsson , Mauro Carvalho Chehab , Michael Ellerman , Michal Hocko , Mike Kravetz , Paul Mackerras , Shuah Khan , Vlastimil Babka , , , , , , , , , , , , , LKML References: <20191121071354.456618-1-jhubbard@nvidia.com> <20191121071354.456618-8-jhubbard@nvidia.com> <20191121080746.GC30991@infradead.org> <20191121143643.GC7448@ziepe.ca> From: John Hubbard X-Nvconfidentiality: public Message-ID: <17835638-d584-f981-faa3-34d57e0990de@nvidia.com> Date: Sat, 23 Nov 2019 22:14:57 -0800 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.2.2 MIME-Version: 1.0 In-Reply-To: <20191121143643.GC7448@ziepe.ca> X-Originating-IP: [10.124.1.5] X-ClientProxiedBy: HQMAIL105.nvidia.com (172.20.187.12) To HQMAIL107.nvidia.com (172.20.187.13) Content-Type: text/plain; charset="utf-8" Content-Language: en-US Content-Transfer-Encoding: 7bit DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=nvidia.com; s=n1; t=1574576100; bh=+mbCPa34GHo19rkSZ8X28MZHFxfKXj0JDCmoAoUgPhA=; h=X-PGP-Universal:Subject:To:CC:References:From:X-Nvconfidentiality: Message-ID:Date:User-Agent:MIME-Version:In-Reply-To: X-Originating-IP:X-ClientProxiedBy:Content-Type:Content-Language: Content-Transfer-Encoding; b=Lxyt3fX3SLobwlYOgojx5q/tcPHCRvrfdyk3qwBay6+crwzq9cmBDOL2v1A93d2/F znbsTdahsKcfBLC3ExDVRiR4xyNb8wuF+IY4tVg2BRT+CWxuHL+tde5mqs3Sjaqc2H pQhchVsKtIHXazVW0nKuBUtZ85yMnPL1fDCuL8YyEbTuF/FrqtWCNE9nir7lTMKyjf tlQWOABZBTB1lSxY5uwVrlwTat+xx62yAomSXn+CUgkL0jIrOlvTsDh31691ux/R3U ne8BFF7YaXlkXhz8ZhdLSUDwwh/yLz0H7gzsTDkDINVi3pBPVt9mKwVrX7BgK6Om2D P0YwnWGSjqBhw== Sender: bpf-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: bpf@vger.kernel.org On 11/21/19 6:36 AM, Jason Gunthorpe wrote: > On Thu, Nov 21, 2019 at 12:07:46AM -0800, Christoph Hellwig wrote: >> On Wed, Nov 20, 2019 at 11:13:37PM -0800, John Hubbard wrote: >>> And get rid of the mmap_sem calls, as part of that. Note >>> that get_user_pages_fast() will, if necessary, fall back to >>> __gup_longterm_unlocked(), which takes the mmap_sem as needed. >>> >>> Reviewed-by: Jan Kara >>> Reviewed-by: Jason Gunthorpe >>> Reviewed-by: Ira Weiny >>> Signed-off-by: John Hubbard >> >> Looks fine, >> >> Reviewed-by: Christoph Hellwig >> >> Jason, can you queue this up for 5.5 to reduce this patch stack a bit? > > Yes, I said I'd do this in an earlier revision. Now that it is clear this > won't go through Andrew's tree, applied to rdma for-next > Great, I'll plan on it going up through that tree. To be clear, is it headed for: git://git.kernel.org/pub/scm/linux/kernel/git/rdma/rdma.git for-next ? thanks, -- John Hubbard NVIDIA