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 Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by smtp.lore.kernel.org (Postfix) with ESMTP id 322CFC64EC4 for ; Thu, 9 Mar 2023 19:58:25 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 79C3B6B0072; Thu, 9 Mar 2023 14:58:24 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id 74CD96B0074; Thu, 9 Mar 2023 14:58:24 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 615566B0075; Thu, 9 Mar 2023 14:58:24 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0012.hostedemail.com [216.40.44.12]) by kanga.kvack.org (Postfix) with ESMTP id 4E26A6B0072 for ; Thu, 9 Mar 2023 14:58:24 -0500 (EST) Received: from smtpin29.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay10.hostedemail.com (Postfix) with ESMTP id 21C01C11CF for ; Thu, 9 Mar 2023 19:58:24 +0000 (UTC) X-FDA: 80550421728.29.5B89727 Received: from dfw.source.kernel.org (dfw.source.kernel.org [139.178.84.217]) by imf19.hostedemail.com (Postfix) with ESMTP id 5D8591A000B for ; Thu, 9 Mar 2023 19:58:22 +0000 (UTC) Authentication-Results: imf19.hostedemail.com; dkim=pass header.d=linux-foundation.org header.s=korg header.b=nkzkF3VK; spf=pass (imf19.hostedemail.com: domain of akpm@linux-foundation.org designates 139.178.84.217 as permitted sender) smtp.mailfrom=akpm@linux-foundation.org; dmarc=none ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1678391902; h=from:from:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references:dkim-signature; bh=2UpWGiaDcd87djOVChA0+RxCJ4xp5FAVsIb2CchtDQ0=; b=EJX/KGy+PSDGDoYVkqcqxpTPY77bLnkNqQqC81rlasG+mqCF8lIM2nzeSLzvm4rTXML0Vy p40k/mQs18ENM594/tSiUvIUC4bjYgrcdzeG8HuJ75jh/hJo+HFutRtTL7r42bfpE3ysi5 zFcz2srogECaxMfzmC45NwaBpYb5Bsg= ARC-Authentication-Results: i=1; imf19.hostedemail.com; dkim=pass header.d=linux-foundation.org header.s=korg header.b=nkzkF3VK; spf=pass (imf19.hostedemail.com: domain of akpm@linux-foundation.org designates 139.178.84.217 as permitted sender) smtp.mailfrom=akpm@linux-foundation.org; dmarc=none ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1678391902; a=rsa-sha256; cv=none; b=GnOfJqamvAwJqLqc3DwjWh51I7vbRNirnb7OvCAf1vTF3xYpfk4okv9E2ZOTsIJ5OYq1vH UifigUwhEGHcErZ4pNV1ZOomkw6mqE5stGHCWueNhWBTIX/KlA5Jo8ZQEiAluL1lv+d80n zoeB0E4RLXMKHYDkkdJhCAAean0U+8w= Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id 45D3061CC3; Thu, 9 Mar 2023 19:58:21 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id AA2C5C433EF; Thu, 9 Mar 2023 19:58:19 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linux-foundation.org; s=korg; t=1678391900; bh=/5mhEH+0jhy2TFRF2A3QBp1K1QEz/XCD8K1TWQPSe08=; h=Date:From:To:Cc:Subject:In-Reply-To:References:From; b=nkzkF3VK95mW2LePnZ6lDNSOg5uGxOS2iIFJhkOnYlWwwsFGiQXzCTQD70rerpX7I O6jvZg07cywqdslFUFZUeCPJ6lZWTGW8ZXDx0mcroxS5kPUkMS3QBaYucRPL6fmwdN jLBI4YFnm9eNZVOUb41pBaBIezxPKUPNb6apsPi4= Date: Thu, 9 Mar 2023 11:58:18 -0800 From: Andrew Morton To: Muhammad Usama Anjum Cc: Peter Xu , David Hildenbrand , =?UTF-8?Q?Micha=C5=82_Miros=C5=82aw?= , Andrei Vagin , Danylo Mocherniuk , Paul Gofman , Cyrill Gorcunov , Mike Rapoport , Nadav Amit , Alexander Viro , Shuah Khan , Christian Brauner , Yang Shi , Vlastimil Babka , "Liam R . Howlett" , Yun Zhou , Suren Baghdasaryan , Alex Sierra , Matthew Wilcox , Pasha Tatashin , Axel Rasmussen , "Gustavo A . R . Silva" , Dan Williams , linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-mm@kvack.org, linux-kselftest@vger.kernel.org, Greg KH , kernel@collabora.com Subject: Re: [PATCH v11 0/7] Implement IOCTL to get and optionally clear info about PTEs Message-Id: <20230309115818.170dd5ef2cde7b58b9354ecd@linux-foundation.org> In-Reply-To: <20230309135718.1490461-1-usama.anjum@collabora.com> References: <20230309135718.1490461-1-usama.anjum@collabora.com> X-Mailer: Sylpheed 3.7.0 (GTK+ 2.24.33; x86_64-pc-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-Rspamd-Server: rspam05 X-Rspamd-Queue-Id: 5D8591A000B X-Stat-Signature: q13cx1umnw436w87rdjyqdwci4upt1xc X-Rspam-User: X-HE-Tag: 1678391902-300077 X-HE-Meta: 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 QTtkgksd yLoX0a1q0MFtvR3PXlZSk4s/LfK3IMu2uNZBuKwoUox+70e+Ln1dkB+NkNaHjjQhhnBXde7M9KSHB77KAXNmZjs3duSTpArFT1Lx22nvwnJQo4cqsifwkJz94i42VpURWe0Axygxzq1t9TOi/h3nMCqSCfbwpS6258Pkv197r87rhxvwt1rgccKKi4viv4iz+aSUzJleWOqeMqU/pNjEJbrk7Z4IHQnzgSbWo6oD7iNm3BOx15u6m6GxL6PyGAvub9kuqFMQQgZW0SHe5JWmawGclSuU1SGfvFGyj8nClrDgitS7LUvy3Feh4O5RXDm+WQAZK+D0uTNHuAg2xVbyFz8DUPis1thlw8Telqlu02y+k4i8= X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: On Thu, 9 Mar 2023 18:57:11 +0500 Muhammad Usama Anjum wrote: > The information related to pages if the page is file mapped, present and > swapped is required for the CRIU project [5][6]. The addition of the > required mask, any mask, excluded mask and return masks are also required > for the CRIU project [5]. It's a ton of new code and what I'm not seeing in here (might have missed it?) is a clear statement of the value of this feature to our users. I see hints that CRIU would like it, but no description of how valuable this is to CRIU's users. So please spend some time preparing this info. Also, are any other applications of this feature anticipated? If so, what are they? IOW, please sell this stuff to us!