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=-1.1 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_PASS 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 A6CB8C43612 for ; Mon, 24 Dec 2018 08:07:08 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 68FFF217D7 for ; Mon, 24 Dec 2018 08:07:08 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=nvidia.com header.i=@nvidia.com header.b="Zc7J0qkO" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726817AbeLXIHH (ORCPT ); Mon, 24 Dec 2018 03:07:07 -0500 Received: from hqemgate16.nvidia.com ([216.228.121.65]:18103 "EHLO hqemgate16.nvidia.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726686AbeLXIHH (ORCPT ); Mon, 24 Dec 2018 03:07:07 -0500 Received: from hqpgpgate101.nvidia.com (Not Verified[216.228.121.13]) by hqemgate16.nvidia.com (using TLS: TLSv1.2, DES-CBC3-SHA) id ; Mon, 24 Dec 2018 00:06:53 -0800 Received: from hqmail.nvidia.com ([172.20.161.6]) by hqpgpgate101.nvidia.com (PGP Universal service); Mon, 24 Dec 2018 00:07:06 -0800 X-PGP-Universal: processed; by hqpgpgate101.nvidia.com on Mon, 24 Dec 2018 00:07:06 -0800 Received: from [10.24.229.42] (10.124.1.5) by HQMAIL101.nvidia.com (172.20.187.10) with Microsoft SMTP Server (TLS) id 15.0.1395.4; Mon, 24 Dec 2018 08:07:02 +0000 Subject: Re: [PATCH] scatterlist: Update size type to support greater then 4GB size. To: Christoph Hellwig CC: , , , , , , , , , , , References: <1544595853-18492-1-git-send-email-amhetre@nvidia.com> <20181212080652.GA14877@infradead.org> From: Ashish Mhetre Message-ID: Date: Mon, 24 Dec 2018 13:37:00 +0530 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.2.1 MIME-Version: 1.0 In-Reply-To: <20181212080652.GA14877@infradead.org> X-Originating-IP: [10.124.1.5] X-ClientProxiedBy: HQMAIL105.nvidia.com (172.20.187.12) To HQMAIL101.nvidia.com (172.20.187.10) Content-Type: text/plain; charset="utf-8"; format=flowed Content-Language: en-US Content-Transfer-Encoding: 7bit DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=nvidia.com; s=n1; t=1545638813; bh=3pFyG3xe8DcvlXHjTZJeB9Jyl+ZtOZg6Daxpqoz1/O8=; h=X-PGP-Universal:Subject:To:CC:References:From:Message-ID:Date: User-Agent:MIME-Version:In-Reply-To:X-Originating-IP: X-ClientProxiedBy:Content-Type:Content-Language: Content-Transfer-Encoding; b=Zc7J0qkOzVbgCW9/Xd3ByQMWvKIIEDYXeIHwoKMZSSD1434Dzck+8821BexPhQ9HO JGrzTKG4+AtC9K/tZFwLtt/INUeELyX3JxMYgiPTdN80EQREDR0b7YSikOAMQdXl9k JUaR/WqgYNwfQK+KN5OmOtBgNDfYmOmNl44xbplDd+YCmZsiHQmmBjROoVCbFRVPwI ELtIcbSDcnAXP9eOj4sZB1/gNfDrY8bEEkSvxN5zBiHJXc8pnVTW7Vuyio/m9ceZuZ m8Bmo082r+31cMRr2R/FMQnBOBIDiLi+DjNehFO1UKRClCZWtihF/eFZOlmNvysJ8z dKYd8Gy2LditQ== Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org We don't have a real use-case for this. Understanding the consequences, we are questioning the patch in downstream itself. Please ignore this patch for now. On 12/12/18 1:36 PM, Christoph Hellwig wrote: > scatterlist elements longer than 4GB sound odd. Please submit it > in a series with your actual user so that we can help figuring out > if it really makes sense or if there is a better way to solve your > problem. > > As is this patch will massively increase the memory usage for all users > of struct scatterlist, so you better have a really good reason. >