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=-6.3 required=3.0 tests=BAYES_00, 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 14B3EC43216 for ; Wed, 1 Sep 2021 08:57:25 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 0BEA961059 for ; Wed, 1 Sep 2021 08:57:23 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org 0BEA961059 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=peda.net Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=kvack.org Received: by kanga.kvack.org (Postfix) id 6A6D46B006C; Wed, 1 Sep 2021 04:57:23 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 6578D6B0071; Wed, 1 Sep 2021 04:57:23 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 546248D0001; Wed, 1 Sep 2021 04:57:23 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0214.hostedemail.com [216.40.44.214]) by kanga.kvack.org (Postfix) with ESMTP id 421C26B006C for ; Wed, 1 Sep 2021 04:57:23 -0400 (EDT) Received: from smtpin06.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay02.hostedemail.com (Postfix) with ESMTP id CE69726DE7 for ; Wed, 1 Sep 2021 08:57:22 +0000 (UTC) X-FDA: 78538400724.06.7CF703F Received: from lb1.peda.net (lb1.peda.net [130.234.6.152]) by imf15.hostedemail.com (Postfix) with ESMTP id 21EC7D000099 for ; Wed, 1 Sep 2021 08:57:22 +0000 (UTC) Received: from [84.251.221.37] (dsl-jklbng12-54fbdd-37.dhcp.inet.fi [84.251.221.37]) by lb1.peda.net (Postfix) with ESMTPSA id 7C986600004; Wed, 1 Sep 2021 11:57:19 +0300 (EEST) Subject: Re: Why is Shmem included in Cached in /proc/meminfo? From: Mikko Rantalainen To: Matthew Wilcox , Vlastimil Babka Cc: Randy Dunlap , linux-kernel@vger.kernel.org, linux-mm@kvack.org References: <5a42eb2b-fd7b-6296-f5d6-619661ad1418@peda.net> <0d11f620-0562-e150-259d-85de8d10cd7a@infradead.org> <14465cfe-281a-0f67-dc17-ead34ec48365@suse.cz> <0cdd0624-fcc3-386e-c651-7173dc3cbb59@peda.net> Message-ID: <9fe84f08-52a6-0ed0-c4cc-639f31f9b7f5@peda.net> Date: Wed, 1 Sep 2021 11:57:19 +0300 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.11.0 MIME-Version: 1.0 In-Reply-To: <0cdd0624-fcc3-386e-c651-7173dc3cbb59@peda.net> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit Authentication-Results: imf15.hostedemail.com; dkim=none; dmarc=none; spf=none (imf15.hostedemail.com: domain of mikko.rantalainen@peda.net has no SPF policy when checking 130.234.6.152) smtp.mailfrom=mikko.rantalainen@peda.net X-Rspamd-Server: rspam03 X-Rspamd-Queue-Id: 21EC7D000099 X-Stat-Signature: hwabcayujkmqmmfajw59nm5a3nnnt1kr X-HE-Tag: 1630486642-475941 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000664, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: Mikko Rantalainen (2021-08-30 20:26 Europe/Helsinki): > Of course one possible solution is to keep "Cached" as is and introduce > "Cache" with the real cache semantics (that is, it includes sum of > (Cached - Shmem) and memory backed RAM). That should have been "swap backed RAM", of course.