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 28BDAC369A2 for ; Fri, 11 Apr 2025 23:49:30 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 8E4F4680034; Fri, 11 Apr 2025 19:49:28 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 8946C680024; Fri, 11 Apr 2025 19:49:28 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 69A4F680034; Fri, 11 Apr 2025 19:49:28 -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 463BF680024 for ; Fri, 11 Apr 2025 19:49:28 -0400 (EDT) Received: from smtpin03.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay07.hostedemail.com (Postfix) with ESMTP id B7F511609D7 for ; Fri, 11 Apr 2025 23:49:28 +0000 (UTC) X-FDA: 83323407216.03.60961F9 Received: from casper.infradead.org (casper.infradead.org [90.155.50.34]) by imf18.hostedemail.com (Postfix) with ESMTP id 909C61C0006 for ; Fri, 11 Apr 2025 23:49:25 +0000 (UTC) Authentication-Results: imf18.hostedemail.com; dkim=pass header.d=infradead.org header.s=casper.20170209 header.b=FV+n3qVX; spf=none (imf18.hostedemail.com: domain of willy@infradead.org has no SPF policy when checking 90.155.50.34) smtp.mailfrom=willy@infradead.org; dmarc=none ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1744415367; 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=adyTZHD/GKDZrHKRH0yui3+8pMUpePl7kMgnizA2joU=; b=G5Bzs/LVQOLVQQYlBRElHjJmuz54jbUQrmS+5Nbydafs2hT27COk/JyeFTx6xG67Z91rEi r651S9b6yidCZ8ga0XMdFoHsm1kUw3Ttq503iVtve53X9Ar4GLjNjAaD+hO4eXfFJUW2VT EzIQkf3TKXVsMZbWUjrqSa+esiVDU+8= ARC-Authentication-Results: i=1; imf18.hostedemail.com; dkim=pass header.d=infradead.org header.s=casper.20170209 header.b=FV+n3qVX; spf=none (imf18.hostedemail.com: domain of willy@infradead.org has no SPF policy when checking 90.155.50.34) smtp.mailfrom=willy@infradead.org; dmarc=none ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1744415367; a=rsa-sha256; cv=none; b=ndwFZqq8phMZ89ojkonDfhSkXIPvATRfWbORioQo/1Pn5vXqTdp3vYuJNCOkcIl5pHBfF6 bBIiRwCPn8YDeAjgcdeA0KsHw4KsKbzm5BawMmHufqtX4YqhqJJxVThbTnwNaY+qVBgEIS CwfUgnReOaxlrTSOk5/thRab9yf1az8= DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=casper.20170209; h=In-Reply-To:Content-Type:MIME-Version: References:Message-ID:Subject:Cc:To:From:Date:Sender:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description; bh=adyTZHD/GKDZrHKRH0yui3+8pMUpePl7kMgnizA2joU=; b=FV+n3qVXRvUCkPwSbL5hKCFmy8 aWcE59RmOBLtobPq/fkSlASwPV+d1F11xuUZoNuZ0SbXYXIPTKPL6uj31+67qMTtCMD78ssh08S4X R4L0EOqtM4XeP7qD4bkwS31+qhmb2cWLKS6XrDM5bgynZgOJDvHuRozwoh8eg9tjoW8/VI53pL15P IJO9sJCVbWRj4+/d03kjrczGs3L0+SyLr31RjjOWNrPWhbsvWHpMkVFwH0uSXZR/njcn9QfNee+wR mkmTYY+u1zqNudlZdauFWbLSvStj2qjsTjZ8cKelBoNOD3Za4JHK9KZZ6OApHeBvPtIG9Xm4pMH3v n/Q90dyQ==; Received: from willy by casper.infradead.org with local (Exim 4.98.2 #2 (Red Hat Linux)) id 1u3O7a-00000004zsr-3zhg; Fri, 11 Apr 2025 23:49:19 +0000 Date: Sat, 12 Apr 2025 00:49:18 +0100 From: Matthew Wilcox To: Gregory Price 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: <20250411221111.493193-1-gourry@gourry.net> X-Rspamd-Queue-Id: 909C61C0006 X-Rspam-User: X-Rspamd-Server: rspam02 X-Stat-Signature: r98oe63qu65nyb1sr65ur39ac5ebx5gb X-HE-Tag: 1744415365-748016 X-HE-Meta: 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 tLOViwv9 TQ9HjPPZz+7y7HLluk2/RKfvJfNDf6bznSdb+ZlY534752bxwADw3tjZqAMOWqq15kD9Fh7jLCcryywffN7BDAzEWr7jAx+7DVGC4oxjYE4d62j71W5OJpYmV4fcKKHrne31lpfwvr51h1kx60ewv4SyE60HL4OqskVAburXo454fb565fs6ni4Uhk94eIgnFMFJPLIHT4uITpp1REJ1nx5YY8Qvc0gych+IDcWAGAIUSr+0= 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: List-Subscribe: List-Unsubscribe: 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.