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=-5.3 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_SANE_1 autolearn=ham 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 0E3CBC17441 for ; Tue, 12 Nov 2019 20:29:32 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id D905021925 for ; Tue, 12 Nov 2019 20:29:31 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=ziepe.ca header.i=@ziepe.ca header.b="mxqrCZSu" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727152AbfKLU3a (ORCPT ); Tue, 12 Nov 2019 15:29:30 -0500 Received: from mail-qk1-f194.google.com ([209.85.222.194]:40996 "EHLO mail-qk1-f194.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726388AbfKLU3a (ORCPT ); Tue, 12 Nov 2019 15:29:30 -0500 Received: by mail-qk1-f194.google.com with SMTP id m125so15688787qkd.8 for ; Tue, 12 Nov 2019 12:29:29 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ziepe.ca; s=google; h=date:from:to:cc:subject:message-id:references:mime-version :content-disposition:in-reply-to:user-agent; bh=9/CN/xP6vJqOjvUwGr7WARnQnaIU03x9y+ycG42MQ4c=; b=mxqrCZSuJup/O7Tk9nbjCrAXv/I6y2Zo1A01a5hwNRvS5TKq103j4QuuhMx1TgbiKk TcToD98p3B/LkXcivRs143K922H29/EXiF4+WtML/koRgsoGaP9oNQstLSZZm1bD9exs 1cHorb8PN0z2CV7n+aeUGymLfLZn+MuvJntXBJRGPUHsnS2WZXJ4z9mnbwdEDCFmPPUr zdAgEfZevh5Zr+vJwZHpWYsKmmW9YyHXXFRC0YlNVqSl54PMnxfnt5NDZO9d3P/oFw6v yMrA8ToPd5oCC0kTplCIvx8XTzt2MoQrQKuYRdLMH60olFuU80IXYkNA5X1z1QNM25zB l/xQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:from:to:cc:subject:message-id:references :mime-version:content-disposition:in-reply-to:user-agent; bh=9/CN/xP6vJqOjvUwGr7WARnQnaIU03x9y+ycG42MQ4c=; b=etPVojrZYYNOKReThVgAWHmcPdiRvmd+dqk7ai/XXIJPRqSgGXHVyoSBcY9uTstuu1 bOkQubqtoDcqWDagYlGGkjZm7eHgOlLeKaXa75Lxd09YVDdWacF4P3w6RKVUy9HpcXY6 XAR/c9GhUulmVI0OsP/Q9LSA3QL0lF0d6QOYgI7YmjDPOp3l16mt1voT09DNafUgQayl bQDfQ8DHTf2ttra1c+EUOvaXh4mi/0DoStHIyaWjLXx9YXCz0f2EDw87XbHil0dZK381 YvRBHikAaZJBrDEKsh7U3SCCBUujqlH8zc1wETjLR1CmvM8WklK5heGO+ew7dKmYme9v RAxA== X-Gm-Message-State: APjAAAXh7SmvPFhrEv7s89lYc3QKF5QEc18cokEnixTmwNMtHc/2hggG CFqFcB/q8cZzXzKNOtkOszFW9+BmIW8= X-Google-Smtp-Source: APXvYqybg5mSANeuBHPAwtpiQwrkuaJ3qSnOCohvuRuZIB0NupFTAxDLE6ppr/vcONzFQpVTRL7HrA== X-Received: by 2002:a37:424a:: with SMTP id p71mr7621409qka.194.1573590568857; Tue, 12 Nov 2019 12:29:28 -0800 (PST) Received: from ziepe.ca (hlfxns017vw-142-162-113-180.dhcp-dynamic.fibreop.ns.bellaliant.net. [142.162.113.180]) by smtp.gmail.com with ESMTPSA id o3sm18630496qtf.84.2019.11.12.12.29.28 (version=TLS1_2 cipher=ECDHE-RSA-CHACHA20-POLY1305 bits=256/256); Tue, 12 Nov 2019 12:29:28 -0800 (PST) Received: from jgg by mlx.ziepe.ca with local (Exim 4.90_1) (envelope-from ) id 1iUcn1-0003pu-NI; Tue, 12 Nov 2019 16:29:27 -0400 Date: Tue, 12 Nov 2019 16:29:27 -0400 From: Jason Gunthorpe To: John Hubbard Cc: Andrew Morton , Ira Weiny , linux-rdma@vger.kernel.org, linux-mm@kvack.org, LKML Subject: Re: [PATCH 1/1] IB/umem: use get_user_pages_fast() to pin DMA pages Message-ID: <20191112202927.GC5584@ziepe.ca> References: <20191109020434.389855-1-jhubbard@nvidia.com> <20191109020434.389855-2-jhubbard@nvidia.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20191109020434.389855-2-jhubbard@nvidia.com> User-Agent: Mutt/1.9.4 (2018-02-28) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Fri, Nov 08, 2019 at 06:04:34PM -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. > > Cc: Jason Gunthorpe > Cc: Ira Weiny > Signed-off-by: John Hubbard > --- > drivers/infiniband/core/umem.c | 17 ++++++----------- > 1 file changed, 6 insertions(+), 11 deletions(-) Reviewed-by: Jason Gunthorpe This can go through Andrew's tree if he takes this larger series, otherwise I'll grab it Thanks, Jason