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=BAYES_00,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,NICE_REPLY_A, SPF_HELO_NONE,SPF_PASS,USER_AGENT_SANE_1 autolearn=no 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 B9709C433DB for ; Mon, 25 Jan 2021 16:01:04 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 869C022583 for ; Mon, 25 Jan 2021 16:01:04 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728927AbhAYQAW (ORCPT ); Mon, 25 Jan 2021 11:00:22 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:36096 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1730595AbhAYP7X (ORCPT ); Mon, 25 Jan 2021 10:59:23 -0500 Received: from mail-pj1-x1029.google.com (mail-pj1-x1029.google.com [IPv6:2607:f8b0:4864:20::1029]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 41B9EC06178A for ; Mon, 25 Jan 2021 07:58:43 -0800 (PST) Received: by mail-pj1-x1029.google.com with SMTP id u4so8990503pjn.4 for ; Mon, 25 Jan 2021 07:58:43 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel-dk.20150623.gappssmtp.com; s=20150623; h=subject:to:cc:references:from:message-id:date:user-agent :mime-version:in-reply-to:content-language:content-transfer-encoding; bh=ydjA7lxNDcY9m5HH4n1Isbc66o3HKVgUPIygbXwoUMM=; b=bI02x67oVJOucPOxKOB9n3X6KcNxCqIpxk5n0fxC4X/uFlQaaUy+xP+qcDK0qgJA7t mWFK2tKkiqtuWxZJvB44mpmemEF/S+YGxTW9vjz8KWnzcutGYJEs+vjezSfpdlvaat30 NrMsLYnxAPDb/60yNPxEjnOGe2XeZLZa2qteFs3BDDpQq8v+NYEA0j27JKKvD8Jo9hGB m1FubjB+dKRDuIvGoJ5Krq3haj3y4rnOv+TQTyR+lsKZVtOzTkhokVPN9B3vqb9Kf/tF OgnBEzoTN7wXg3qcCOF4/ajnPQb9aZOpN8ShjkT8r+GX28FyVyVD2Nsgv5WX9h7sZf9A iVhw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:subject:to:cc:references:from:message-id:date :user-agent:mime-version:in-reply-to:content-language :content-transfer-encoding; bh=ydjA7lxNDcY9m5HH4n1Isbc66o3HKVgUPIygbXwoUMM=; b=rse7v9PJRqaSpY9YGDjQcNXHxfnHcfvvHkOALJ6DjAe1TVWa9KuoDmw3kRZBFrMsA/ nl+o7J3bJSjWEUkOKnNRUQfP971QP3xcx3gNT7fKZPt3cdTssJbSrfQziMN8Q9V4WfzV TKfaBKVEOSpPd58uYtusVfRVO07K82wEIoOUdOEhujf0tyTRwSaTRKS0oKqyy4UkynX/ 63oOFMb2LkWz7rOKlx91NfWWj/xJONRKFSIGh3eKB9JXVH64R0+Hi9a+Ni+ZfCYRKDkb zjuYTGO8UrXKoMcaFQ9FUy33Mg0jp3XDrqNHwGGYXXRiZ7jrssDVSX60bbXNDl4aLqMQ zLsw== X-Gm-Message-State: AOAM532xYZROSDB59NOvADrXAeLJq/8xUwXL6XDt3qTAJEch33kTRJZe 716qUszsrhxxYiS8SMWFR7QCyg== X-Google-Smtp-Source: ABdhPJxvYFudM0/t7uvN4OEM1XLPVgOQbMzfZischKww36TwjmQpcH3dkzLr1QJ1pvzT7oKrjCpfaw== X-Received: by 2002:a17:90a:6f05:: with SMTP id d5mr843071pjk.145.1611590322691; Mon, 25 Jan 2021 07:58:42 -0800 (PST) Received: from [192.168.4.41] (cpe-72-132-29-68.dc.res.rr.com. [72.132.29.68]) by smtp.gmail.com with ESMTPSA id i25sm16942011pgb.33.2021.01.25.07.58.39 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 25 Jan 2021 07:58:41 -0800 (PST) Subject: Re: [PATCH v3 0/7] no-copy bvec To: Pavel Begunkov , linux-block@vger.kernel.org Cc: Christoph Hellwig , Matthew Wilcox , Ming Lei , Johannes Weiner , Alexander Viro , "Darrick J . Wong" , "Martin K . Petersen" , Jonathan Corbet , linux-xfs@vger.kernel.org, linux-fsdevel@vger.kernel.org, io-uring@vger.kernel.org, linux-kernel@vger.kernel.org, target-devel@vger.kernel.org, linux-scsi@vger.kernel.org, linux-doc@vger.kernel.org References: From: Jens Axboe Message-ID: Date: Mon, 25 Jan 2021 08:58:38 -0700 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.10.0 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: io-uring@vger.kernel.org On 1/9/21 9:02 AM, Pavel Begunkov wrote: > Currently, when iomap and block direct IO gets a bvec based iterator > the bvec will be copied, with all other accounting that takes much > CPU time and causes additional allocation for larger bvecs. The > patchset makes it to reuse the passed in iter bvec. Applied, thanks. -- Jens Axboe