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=-8.1 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,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 C45C0C2D0CE for ; Tue, 21 Jan 2020 20:41:11 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 8C941217F4 for ; Tue, 21 Jan 2020 20:41:11 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="VTKHm1Vv" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728596AbgAUUlL (ORCPT ); Tue, 21 Jan 2020 15:41:11 -0500 Received: from mail-pj1-f68.google.com ([209.85.216.68]:36014 "EHLO mail-pj1-f68.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728139AbgAUUlL (ORCPT ); Tue, 21 Jan 2020 15:41:11 -0500 Received: by mail-pj1-f68.google.com with SMTP id n59so2185408pjb.1 for ; Tue, 21 Jan 2020 12:41:10 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=cc:subject:to:references:from:message-id:date:user-agent :mime-version:in-reply-to:content-language:content-transfer-encoding; bh=tuHPm+Hv+rWPvNU00Z0Kev24CpKwJPlVsAAKDjBj8fM=; b=VTKHm1VvZyAJxMEvHfmTvJqfb0w0DPCrdayQ/Qg6Q68OnNQ42DnRyD+p2723yUDiGK xzDBXN4DDnSVxlb5qO3pLDZhWXrzti5SGeke7k/w0PcHaS6pqxeC8Wd5BUuyFOgJHmqh NQKOYFoUCtakPyLXtAQDVitO6WQsifexZvc94eeXrK/fClyn3nCU9aUZMqYVSa/ch+rt CQ5zo47lz1dcuXA92jKqqRkUV/VS8yZRXiHZh9d3TxDaWl2nJXJEhVWJfaZ8DMPaCVHP AH7OGS5PObhZavd8dbaqDGtw3/i5kMacPy9jILow6vt8MpcL/R+OlN4ttONAhaxhN0Ra 5URw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:cc:subject:to:references:from:message-id:date :user-agent:mime-version:in-reply-to:content-language :content-transfer-encoding; bh=tuHPm+Hv+rWPvNU00Z0Kev24CpKwJPlVsAAKDjBj8fM=; b=OMArh3P/wZfk7ZyOw89UHW3Y42fZGLkJnUKUyxxTnXKhL4nG3ONsk/f4Nfus2JIqiu JA3EoKGiHOeVKiJoCnpIbwDUaFntTDFP93gixTExdfiP6JTrz0liEnM3BAGSkKBX4eo3 dOSf3eKQEcX+MInbe0M9Unb8B/42EiTVo4laRF3cVBLvhfg0/LJqmixuwy6ovAO448U3 cM/oQs4VrMVhB2P6Qbn3PMpQdtnOXxitKp+gXoeGJuxy9xd+CxPPsrCFpipg4gpyto+k svPnuCGOKtD6ayQW/ALcNLAMWAv1gK8obvI3zuncU6YHe+qamzooB9qP6aG02rP3VSX1 onLA== X-Gm-Message-State: APjAAAXhnthsHwE7urFMQdbmfRibW88bsPf+tgLbo2j+lBUZya5dEyAx i4W6GY1dk+QzvibCwGAstGjw0tHG X-Google-Smtp-Source: APXvYqy1/m03YUCUdhaWOFQoXBiw6/FlAAuE0pSPUgtpuX6GrMzvJPkTDeRziRmSVrRWkQXKxNBFnw== X-Received: by 2002:a17:902:9687:: with SMTP id n7mr7472015plp.168.1579639270259; Tue, 21 Jan 2020 12:41:10 -0800 (PST) Received: from [192.168.1.72] (122-58-99-230-adsl.sparkbb.co.nz. [122.58.99.230]) by smtp.gmail.com with ESMTPSA id c15sm315468pja.30.2020.01.21.12.41.07 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Tue, 21 Jan 2020 12:41:09 -0800 (PST) Cc: mtk.manpages@gmail.com, linux-man@vger.kernel.org Subject: Re: [PATCH v1 1/2] loop.4: Document LOOP_SET_DIRECT_IO To: Yang Xu References: <1578296543-4195-1-git-send-email-xuyang2018.jy@cn.fujitsu.com> From: "Michael Kerrisk (man-pages)" Message-ID: <9c39f02d-fe47-a047-4882-8aa31254c2fb@gmail.com> Date: Tue, 21 Jan 2020 21:41:05 +0100 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.3.1 MIME-Version: 1.0 In-Reply-To: <1578296543-4195-1-git-send-email-xuyang2018.jy@cn.fujitsu.com> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit Sender: linux-man-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-man@vger.kernel.org On 1/6/20 8:42 AM, Yang Xu wrote: > Signed-off-by: Yang Xu Hello Yang Xu. Thanks. Patch applied. Cheers, Michael > --- > man4/loop.4 | 7 +++++++ > 1 file changed, 7 insertions(+) > > diff --git a/man4/loop.4 b/man4/loop.4 > index a56586fe6..afb1d05c5 100644 > --- a/man4/loop.4 > +++ b/man4/loop.4 > @@ -152,6 +152,13 @@ Resize a live loop device. > One can change the size of the underlying backing store and then use this > operation so that the loop driver learns about the new size. > This operation takes no argument. > +.TP > +.BR LOOP_SET_DIRECT_IO " (since Linux 4.10)" > +.\" commit ab1cb278bc7027663adbfb0b81404f8398437e11 > +Set DIRECT IO mode on the loop device. So it can be used to open backing > +file. The (third) > +.BR ioctl(2) > +argument is an unsigned long value. non-zero represents direct IO mode. > .PP > Since Linux 2.6, there are two new > .BR ioctl (2) > -- Michael Kerrisk Linux man-pages maintainer; http://www.kernel.org/doc/man-pages/ Linux/UNIX System Programming Training: http://man7.org/training/