From patchwork Sat Nov 9 02:04:33 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: John Hubbard X-Patchwork-Id: 11235769 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id B876B1515 for ; Sat, 9 Nov 2019 02:04:44 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 97299218AE for ; Sat, 9 Nov 2019 02:04:44 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=nvidia.com header.i=@nvidia.com header.b="YOCyGKxW" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726099AbfKICEk (ORCPT ); Fri, 8 Nov 2019 21:04:40 -0500 Received: from hqemgate15.nvidia.com ([216.228.121.64]:16412 "EHLO hqemgate15.nvidia.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726227AbfKICEj (ORCPT ); Fri, 8 Nov 2019 21:04:39 -0500 Received: from hqpgpgate102.nvidia.com (Not Verified[216.228.121.13]) by hqemgate15.nvidia.com (using TLS: TLSv1.2, DES-CBC3-SHA) id ; Fri, 08 Nov 2019 18:03:38 -0800 Received: from hqmail.nvidia.com ([172.20.161.6]) by hqpgpgate102.nvidia.com (PGP Universal service); Fri, 08 Nov 2019 18:04:39 -0800 X-PGP-Universal: processed; by hqpgpgate102.nvidia.com on Fri, 08 Nov 2019 18:04:39 -0800 Received: from HQMAIL109.nvidia.com (172.20.187.15) by HQMAIL107.nvidia.com (172.20.187.13) with Microsoft SMTP Server (TLS) id 15.0.1473.3; Sat, 9 Nov 2019 02:04:35 +0000 Received: from hqnvemgw03.nvidia.com (10.124.88.68) by HQMAIL109.nvidia.com (172.20.187.15) with Microsoft SMTP Server (TLS) id 15.0.1473.3 via Frontend Transport; Sat, 9 Nov 2019 02:04:35 +0000 Received: from blueforge.nvidia.com (Not Verified[10.110.48.28]) by hqnvemgw03.nvidia.com with Trustwave SEG (v7,5,8,10121) id ; Fri, 08 Nov 2019 18:04:35 -0800 From: John Hubbard To: Andrew Morton , Jason Gunthorpe CC: Ira Weiny , , , LKML , John Hubbard Subject: [PATCH 0/1] IB/umem: use get_user_pages_fast() to pin DMA pages Date: Fri, 8 Nov 2019 18:04:33 -0800 Message-ID: <20191109020434.389855-1-jhubbard@nvidia.com> X-Mailer: git-send-email 2.24.0 MIME-Version: 1.0 X-NVConfidentiality: public DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=nvidia.com; s=n1; t=1573265018; bh=OqJk4HwxLFuiZxdO7FdtWiG3lR2+WoDbxn35lzBPFEw=; h=X-PGP-Universal:From:To:CC:Subject:Date:Message-ID:X-Mailer: MIME-Version:X-NVConfidentiality:Content-Transfer-Encoding: Content-Type; b=YOCyGKxWMrdneUTApO1JO0AD8WOGde1bL/i2yAwWv9uB/2L10471+O5wB9x8Z0fw/ TpmNgOUBtwduig9BYJ5LfK9tDpHgLYbDqeegbLVsY4krqNGwM7Q4uvSibNlFQdzjQ/ CZ6bRrmWwfOzM3KDmnDSpJm74cIlI7Nm89IaJa8SnX46RBO0WvJ9dlG0squYSR4AGT Fb4HYE4t/Y+1VfG8lpweNGrsEL2MvOnQ/oHyThXUXDsj+qGbS48d21+vj55/jo+Os8 pAc5nVyWGSsQT8FiD75YWNFQvVRFdiDwFZoHaFYiIE9lHwIvmu8QXlWwvsfL4ixkj9 LqCoDBxhGIvCw== Sender: linux-rdma-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-rdma@vger.kernel.org Hi Jason, Andrew, Jason: Here is the change to get_user_pages_fast(), that you requested during the review of "mm/gup: track dma-pinned pages: FOLL_PIN, FOLL_LONGTERM" [1]. This is a stand-alone patch that applies to today's 5.4.0-rc6 linux.git. If anyone could please provide any run-time testing (and of course, Reviewed-by's), that would be huge. I've compiled and run it, but bpftrace tells me (as I already knew) that my current anemic IB setup is not actually exercising this code path. Andrew: unless instructed otherwise, I plan to also re-post this as part of the next (v3) version of [1], and hopefully have the whole series go through your tree. That would avoid merge conflicts, and as I understand it, there is no particular urgency for this patch, so we might as well do it the easy way. John Hubbard (1): IB/umem: use get_user_pages_fast() to pin DMA pages drivers/infiniband/core/umem.c | 17 ++++++----------- 1 file changed, 6 insertions(+), 11 deletions(-)