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 5E095C369AE for ; Sat, 12 Apr 2025 00:10:02 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 4AEAF680035; Fri, 11 Apr 2025 20:10:00 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 48411680024; Fri, 11 Apr 2025 20:10:00 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 34A34680035; Fri, 11 Apr 2025 20:10:00 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0015.hostedemail.com [216.40.44.15]) by kanga.kvack.org (Postfix) with ESMTP id 17C06680024 for ; Fri, 11 Apr 2025 20:10:00 -0400 (EDT) Received: from smtpin09.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay10.hostedemail.com (Postfix) with ESMTP id 34D13C0977 for ; Sat, 12 Apr 2025 00:10:01 +0000 (UTC) X-FDA: 83323459002.09.F439A91 Received: from mail-qk1-f170.google.com (mail-qk1-f170.google.com [209.85.222.170]) by imf14.hostedemail.com (Postfix) with ESMTP id 65A98100008 for ; Sat, 12 Apr 2025 00:09:59 +0000 (UTC) Authentication-Results: imf14.hostedemail.com; dkim=pass header.d=gourry.net header.s=google header.b=VQHnLUIP; spf=pass (imf14.hostedemail.com: domain of gourry@gourry.net designates 209.85.222.170 as permitted sender) smtp.mailfrom=gourry@gourry.net; dmarc=none ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1744416599; 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: in-reply-to:in-reply-to:references:references:dkim-signature; bh=sRXqNVmIqyS+Jz6z2updy3JXW7i0nvOqZaWjs39Mac4=; b=1v1iZR/mPPhbVlECpBx/j3o5lN8V8NCdWBsvx3eki35U2QgvYROGVtFjGuX7ArsdWTijXr hVKA+K5IctcGf7gLHaEdkcFoTbhYyysKMj/fzlyqc/mjW1CWfCO4oWbq3DLikJxVoJXLMP gbz/nCN1wyWc9UjPEz92M4aL1mzbJsA= ARC-Authentication-Results: i=1; imf14.hostedemail.com; dkim=pass header.d=gourry.net header.s=google header.b=VQHnLUIP; spf=pass (imf14.hostedemail.com: domain of gourry@gourry.net designates 209.85.222.170 as permitted sender) smtp.mailfrom=gourry@gourry.net; dmarc=none ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1744416599; a=rsa-sha256; cv=none; b=hrRkcHx9UANys64i6yiFKnRGfRCYuuKQpgQ+v+/cpRUvSqHE3kkBfnnERd2dQJO8rShN+H ZWz29zQkgygSFm98MtRRW+940ioqBwr97cXT19SRLNr+94Bx2APyQ0d6j4eZ03Np5inGTT 4M4fp6mvDfZiXen54xDAu3JbUgf1jN0= Received: by mail-qk1-f170.google.com with SMTP id af79cd13be357-7c58974ed57so246405685a.2 for ; Fri, 11 Apr 2025 17:09:59 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gourry.net; s=google; t=1744416598; x=1745021398; darn=kvack.org; h=in-reply-to:content-disposition:mime-version:references:message-id :subject:cc:to:from:date:from:to:cc:subject:date:message-id:reply-to; bh=sRXqNVmIqyS+Jz6z2updy3JXW7i0nvOqZaWjs39Mac4=; b=VQHnLUIP3YwIKZuIpI46A75Mq3IJjTy76lMPCxVUqF5VoceGBywf85sFsOQuwElYWr BG44gYoys4WAKuHamETF4mUZJq4o/4c3xmlcjLwEmtsrne8vnIdqha+hsuqcXiyAu9hF EKBY2nfgSRpDOjxcP/m1hy49hFfqxBjJzfdawbvthouMT1HmoxYVWVts5hFQKrUxinB9 Wo/k2h7FHSvNbF6Vxfk7SS5G6XvUfjYYqo1GzjcDCOOSYfYllRFiA/010svznhFZEbRQ fGq6GOJsU1d4qxqMsltRbnHahHn7K22fv3DGacRHXsQXNCfNanDnF/itgmkEKIIUqhuG ycUA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1744416598; x=1745021398; h=in-reply-to:content-disposition:mime-version:references:message-id :subject:cc:to:from:date:x-gm-message-state:from:to:cc:subject:date :message-id:reply-to; bh=sRXqNVmIqyS+Jz6z2updy3JXW7i0nvOqZaWjs39Mac4=; b=Gzk8SGF+WzqVlqMHJmNefILAa//TUhZqjhGUvezCgUhRjnZx4as7+16IqeOafefVC2 Lnxqn/s5UNq6UvMDWJxtOc5zCEchnXX94V97JooVrFtEZ+tZwO7tE4r8rbl40znAX1lC OiOFtbIM1OpSw40yfAm1IWVFmm/GoyS02U6QkjL1WgAuYlgcs0OJw+NSfC1n4hVAAtiT AK0sZpK9WiT3LFbCRNbKaQzqFGove94aWHu5Zt7eOHfQCAw+iqiYHGXR7xMu0zrgNrgx 9JQKIp4+EG2rNB9A0w6N7fi3JL+XsdKZ9X2T0nBAMdY11uoGuT4Ytz03V9xGcMK/iveL VibA== X-Gm-Message-State: AOJu0Yx7VXnyQOo/f6fcx9Cmyo6Ie1+TKDI10RtxdfWncsHYLq0xkZd2 rhr+7byRNt4wCeaqJiOlfs+hQfMF949ksmWCBeQ0H9Vc/l781cRf+Yhy968fn9U= X-Gm-Gg: ASbGncsRjHeopU8+atgXxzZrBTxyyMimVdoFtYbTVdAhU6i21AgISG2ERwwY2HHQ0j9 AQTJbPdvJXMh84gf6uLL+G6OZPHHcQh7LhAa5P5ZZIMtRSblM4AyTWkX2nT2oS7a0ClCuxlNMM/ yWeqZpm8WMi6FgM0ouMwij63DipXXCs9UwfFAVwLT+IupJ/zTIQnlDB94gPad+XHylEDOfDJ9tI 1bQ1ab/wW2ChWf+Yxt5DrG7f4O1JNU5ct+L47/KiNVqlbfM17mUylugPLrvVgICokcOgtVtPSsp 5rqSrzoHP4uNoQ1qKd6vbz8YUKZWW9HuC0o1EVjUZMjBkkpiFFIgTcBBiShnCOzgzSxWnqcy8cd n5gnKDfbCdRcqWf+KW+srvBmmP1t/AeFhKQ== X-Google-Smtp-Source: AGHT+IE5Xlwy4jufzqg2VNoz64xedL1xgIf+lmQN007iCJsS30QUHvJ5IGhsqxtG1KRey8ZizqlU6w== X-Received: by 2002:a05:620a:468a:b0:7c0:be39:1a34 with SMTP id af79cd13be357-7c7af12dde8mr794060785a.43.1744416598362; Fri, 11 Apr 2025 17:09:58 -0700 (PDT) Received: from gourry-fedora-PF4VCD3F (pool-173-79-56-208.washdc.fios.verizon.net. [173.79.56.208]) by smtp.gmail.com with ESMTPSA id af79cd13be357-7c7a8a0e6ddsm329175385a.107.2025.04.11.17.09.57 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 11 Apr 2025 17:09:57 -0700 (PDT) Date: Fri, 11 Apr 2025 20:09:55 -0400 From: Gregory Price To: Matthew Wilcox Cc: linux-mm@kvack.org, cgroups@vger.kernel.org, linux-kernel@vger.kernel.org, kernel-team@meta.com, akpm@linux-foundation.org, mingo@redhat.com, peterz@infradead.org, juri.lelli@redhat.com, vincent.guittot@linaro.org, hannes@cmpxchg.org, mhocko@kernel.org, roman.gushchin@linux.dev, shakeel.butt@linux.dev, donettom@linux.ibm.com, Huang Ying , Keith Busch , Feng Tang , Neha Gholkar Subject: Re: [RFC PATCH v4 0/6] Promotion of Unmapped Page Cache Folios. Message-ID: References: <20250411221111.493193-1-gourry@gourry.net> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: X-Rspamd-Queue-Id: 65A98100008 X-Stat-Signature: tad6rqeyaijj9z6owqfee5r1uzs4gssa X-Rspam-User: X-Rspamd-Server: rspam12 X-HE-Tag: 1744416599-69097 X-HE-Meta: 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 EgXQIn4x pmJHKFnArvXV6alyDP/sfxNTx5QdQ++/xNkemCdtT42tQ+muM9JeUTRB2cDhLG8El9Hi9MBQ/dmguz1la9KZqabjGuJjYlLOYk4QWb7AOJ+xs9m7e3FZTVn/e4R7z5vNhznuFCkVsHuqIvfqSlMdTV8WbGPnAh4huC1LexC3mn2lFbjODR1PMNQYe+FbKQULfVF4qtY7FHyf9a/F9gcitYjlbwoRp8vEwIwxbO33wmMgY82nb7K67llikP/85aA/GmGIWDOuFbjLD7h31TVeGSG17gs8/U8T/ND9jiaGJ6aEvQqg9047biljmfxt3X2WwtI4RdRXxzEi1qKE= X-Bogosity: Ham, tests=bogofilter, spamicity=0.000027, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On Sat, Apr 12, 2025 at 12:49:18AM +0100, Matthew Wilcox wrote: > On Fri, Apr 11, 2025 at 06:11:05PM -0400, Gregory Price wrote: > > Unmapped page cache pages can be demoted to low-tier memory, but > > No. Page cache should never be demoted to low-tier memory. > NACK this patchset. This wasn't a statement of approval page cache being on lower tiers, it's a statement of fact. Enabling demotion causes this issue. ~Gregory