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 389A9C02183 for ; Fri, 17 Jan 2025 07:56:19 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 872206B0082; Fri, 17 Jan 2025 02:56:17 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id 822596B0083; Fri, 17 Jan 2025 02:56:17 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 6EA756B0085; Fri, 17 Jan 2025 02:56:17 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0011.hostedemail.com [216.40.44.11]) by kanga.kvack.org (Postfix) with ESMTP id 523F36B0082 for ; Fri, 17 Jan 2025 02:56:17 -0500 (EST) Received: from smtpin04.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay03.hostedemail.com (Postfix) with ESMTP id B7BF2A1757 for ; Fri, 17 Jan 2025 07:56:16 +0000 (UTC) X-FDA: 83016185952.04.83787DC Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) by imf29.hostedemail.com (Postfix) with ESMTP id 95B04120006 for ; Fri, 17 Jan 2025 07:56:14 +0000 (UTC) Authentication-Results: imf29.hostedemail.com; dkim=pass header.d=infradead.org header.s=bombadil.20210309 header.b="3g8uUr/z"; spf=none (imf29.hostedemail.com: domain of BATV+61d77501dfe03cdea103+7817+infradead.org+hch@bombadil.srs.infradead.org has no SPF policy when checking 198.137.202.133) smtp.mailfrom=BATV+61d77501dfe03cdea103+7817+infradead.org+hch@bombadil.srs.infradead.org; dmarc=none ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1737100575; 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=0xS4rzAwShP4fR0GmRf+Y/L+j7Nhbi6WmSe8J0Qupus=; b=AJeRp/p5fOZlAbxfzNFhG+gLwWdUaMnKk9+QfUpAbFt2KMoRzzkyMLEz5hD3QO4OSzHpKU j0CO0YNasm5m6LcnxRiMALGLbvibq9ACdmrO1C+iquJpSd75UhxcE5X1HgPPiqHxG5Wib1 7YGCpqaWQ9W8qRAObmKqELOdQ9O3VB0= ARC-Authentication-Results: i=1; imf29.hostedemail.com; dkim=pass header.d=infradead.org header.s=bombadil.20210309 header.b="3g8uUr/z"; spf=none (imf29.hostedemail.com: domain of BATV+61d77501dfe03cdea103+7817+infradead.org+hch@bombadil.srs.infradead.org has no SPF policy when checking 198.137.202.133) smtp.mailfrom=BATV+61d77501dfe03cdea103+7817+infradead.org+hch@bombadil.srs.infradead.org; dmarc=none ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1737100575; a=rsa-sha256; cv=none; b=wVe/uErpDECavG/pyTnCo884KOuHz1OdmddCKOWkvxUKhQ54ghPYvTyV12ymQiYAjgNd2h jtb37a/mhwA0jrYzaVwHJOekzuHy0hkqBBzfflyYZnpSwD8Ta4ASgYK7OhLxx5Hg0yn2ep UrP4uRuhRAQYnTkCPFAWdCuiAvysipo= DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=bombadil.20210309; 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=0xS4rzAwShP4fR0GmRf+Y/L+j7Nhbi6WmSe8J0Qupus=; b=3g8uUr/zQeamxBYJg5IR9w1nI5 4XFglwglcwD6Kg+PhuCwG7MVHgvS5R/Pv5qLbbjmqEPK6DcIdD8PqbKmKt2IqippGnsPrcU8W8Ymy XYnki7fkGVODbJ/QGQkw95oNIYJRFIlp6gFu4h4wfGz+AXhghuLQOG4XlVtrU+INYLUoGcKddyaCm q3GJGEWpcbQcUCO0eIRoTyJ1iV3dj8zetOQr9Rbg7SOb/YBakeHaz9vZ9YgflNRZZP5NVMotg68rR 6TGchrX0Hlb2sgEsRFJEjDaIE7qkOcAzCPou0RQ4xolbPR3/9ssMsF8+dP0kUVg/7qGKwYqvmaaHR 0EfZr12g==; Received: from hch by bombadil.infradead.org with local (Exim 4.98 #2 (Red Hat Linux)) id 1tYhD7-0000000HGFi-3cg9; Fri, 17 Jan 2025 07:56:09 +0000 Date: Thu, 16 Jan 2025 23:56:09 -0800 From: Christoph Hellwig To: Jaegeuk Kim Cc: Christoph Hellwig , linux-kernel@vger.kernel.org, linux-f2fs-devel@lists.sourceforge.net, Al Viro , Jan Kara , Christian Brauner , linux-fsdevel@vger.kernel.org, linux-api@vger.kernel.org, linux-man@vger.kernel.org, linux-mm@kvack.org Subject: Re: [PATCH 1/2] f2fs: register inodes which is able to donate pages Message-ID: References: <20250115221814.1920703-1-jaegeuk@kernel.org> <20250115221814.1920703-2-jaegeuk@kernel.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org. See http://www.infradead.org/rpr.html X-Rspam-User: X-Rspamd-Server: rspam09 X-Rspamd-Queue-Id: 95B04120006 X-Stat-Signature: 3wuqad46nnmoedsyf9y1ntje8axcc6oj X-HE-Tag: 1737100574-207876 X-HE-Meta: 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 kyA9auDN nzyp4Zedu5kaLuV0GHka+dGQbeMe83bxOCHEQtpC61njyJ+CVHDCcT7DTDA2oDabxB/JPVcLdUWhLbtQEtqO4ajE75T3m88C0BDb4uxgKKu3FhDLMBBW1MnysPscdHRZsFi/tH4fhgCAjvLYSomh+bD86lykL6Am8SORPyMjprpcnxkJC66Gqd4in+MBUQY5whF0q1wr+54HrGZgZjQ1oOjcvLBZGzJ9D8eAPTqs9r7FsuKLW83MgzNjy9ge9NHIeELfmszeBjrF+vELfTYQm2pyj30JRygnfPz+wscK6OXqWlKWvczUEk33IrllhuTMGIEu2cFwXpy2DHHCOx/AVgCX3vTa/79356NblXJ3bDL6YFnzQ8/SS+TdUL2aJXbiz6FXPDgM66+RSibWzNr9xXaBNnpg2PomX4xhCN8kORbll/se0UfKUcThsmyd64qH2vTae98LQ34oAj6LVFeg2OWAWWnyNeMSW/cCp 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 Thu, Jan 16, 2025 at 05:19:24PM +0000, Jaegeuk Kim wrote: > > mean a invalidate_inode_pages2_range. Which is a strange use of the > > word. what are the use cases? Why is this queued up to a thread and > > not done inline? Why is this in f2fs and not in common code. > > The idea is let apps register some file ranges for page donation and admin > recliam such pages all togehter if they expect to see memory pressure soon. > We can rely on LRU, but this is more user-given trigger. I'm not sure whether > there's a need in general, hence, wanted to put it in f2fs first to get more > concrete use-cases beyond this Android case. Well, that's certainly not a file system feature. Please build this as generic infrastucture and send it to the linux-mm list.