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 E1E10C4167B for ; Fri, 15 Dec 2023 19:24:48 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 667C58D0139; Fri, 15 Dec 2023 14:24:48 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id 616FD8D0121; Fri, 15 Dec 2023 14:24:48 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 4DF458D0139; Fri, 15 Dec 2023 14:24:48 -0500 (EST) 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 3EC0B8D0121 for ; Fri, 15 Dec 2023 14:24:48 -0500 (EST) Received: from smtpin20.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay05.hostedemail.com (Postfix) with ESMTP id 0FB4D40EAE for ; Fri, 15 Dec 2023 19:24:48 +0000 (UTC) X-FDA: 81570029856.20.DFBCA90 Received: from sin.source.kernel.org (sin.source.kernel.org [145.40.73.55]) by imf13.hostedemail.com (Postfix) with ESMTP id F41E120015 for ; Fri, 15 Dec 2023 19:24:44 +0000 (UTC) Authentication-Results: imf13.hostedemail.com; dkim=pass header.d=linux-foundation.org header.s=korg header.b=GdIGWLIf; dmarc=none; spf=pass (imf13.hostedemail.com: domain of akpm@linux-foundation.org designates 145.40.73.55 as permitted sender) smtp.mailfrom=akpm@linux-foundation.org ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1702668285; 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=EXPoS75Mx9vFfao90ouanrKOLsHMr2/FH3xVp8NDg5I=; b=tHJfVQ5J7LOZCPzuDSSUMAC6PtzZzTu+bVa8vJQaj9yizK+ktnFCAdRjWel5Vr0GjpdFMZ HHbIO8yvbmvuir8qn2JTHCJxSwho9ytKE8y41hNU4VCBaQ3JAFEIEPmST2AUSN1eak3RpH 74H+3JINuUeakfsQxkfj7PSP9nNvqMY= ARC-Authentication-Results: i=1; imf13.hostedemail.com; dkim=pass header.d=linux-foundation.org header.s=korg header.b=GdIGWLIf; dmarc=none; spf=pass (imf13.hostedemail.com: domain of akpm@linux-foundation.org designates 145.40.73.55 as permitted sender) smtp.mailfrom=akpm@linux-foundation.org ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1702668285; a=rsa-sha256; cv=none; b=qudqaX2O86TaFk9L5n1eAylEEfQZoU116W87axQdAzn6JT47co14//DCBst6EIH4c3uD+E 5jfqQ9/XpolfjcD5vvFUZz0qgqtX8qMZaIskSRkN5FDROiHOV+v4KhuF9+zpLRZdcc41go ioo6KF6dI9SzLtUJRwn7YjnBnSKOUH4= Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by sin.source.kernel.org (Postfix) with ESMTP id AFDDACE2408; Fri, 15 Dec 2023 19:24:40 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id AC3CEC433C7; Fri, 15 Dec 2023 19:24:37 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linux-foundation.org; s=korg; t=1702668278; bh=7GKOWTHeLhcPaRSYOOjlnHul/VurODSjj9PrACw8s3Q=; h=Date:From:To:Cc:Subject:In-Reply-To:References:From; b=GdIGWLIf8/T2P1aKV3L5uWyvsBL9y5wks4C2WWMrZs8+Qs52kJ9DgBvWWYIVRbwun Yz2kAwl3TyfoPfUAoCPBRxdbG2wzDtzltsQu+3t0QZZ3WqvCCMhWraxXqYYKyMmJeU o25HuAFj94b9WK5u+mA/GnGE7oqry15PxpS4HZaU= Date: Fri, 15 Dec 2023 11:24:37 -0800 From: Andrew Morton To: "Huang, Ying" Cc: Michal Hocko , Minchan Kim , Yosry Ahmed , Liu Shixin , Yu Zhao , Sachin Sant , Johannes Weiner , Kefeng Wang , linux-mm@kvack.org, linux-kernel@vger.kernel.org, Mel Gorman Subject: Re: [PATCH v10] mm: vmscan: try to reclaim swapcache pages if no swap space Message-Id: <20231215112437.d265299e270722d540e4a246@linux-foundation.org> In-Reply-To: <878r5wqcmy.fsf@yhuang6-desk2.ccr.corp.intel.com> References: <87msv58068.fsf@yhuang6-desk2.ccr.corp.intel.com> <87h6l77wl5.fsf@yhuang6-desk2.ccr.corp.intel.com> <87r0ka64v9.fsf@yhuang6-desk2.ccr.corp.intel.com> <20231213151341.9ae5fa2bdc266d794a7eed39@linux-foundation.org> <878r5wqcmy.fsf@yhuang6-desk2.ccr.corp.intel.com> X-Mailer: Sylpheed 3.8.0beta1 (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-Queue-Id: F41E120015 X-Rspam-User: X-Rspamd-Server: rspam05 X-Stat-Signature: kisx4gh3yb8ay74xfzxc6igki59frijs X-HE-Tag: 1702668284-838473 X-HE-Meta: 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 e1aOsdbC 1JmmkB1DR6le/V3auUSIioFiZZMqoXtBJoAkbCcey82ZMICCTsgreWOqIY7AJh/8971fUQ6s7QCuGrPD2Ly74bvoh8eO2uWqHG3WtLKy3SuSmXvibDZv3HZIaC71xr1yGyoA+GnPCjENz52VBd1ge8rd9tmpSQWPiNSpyX8ZRJ0myorpUiOglCR8hd3t/85d+ZGZpSUOSeGid5prW3Lj2kjhk5eL2clnWr2HWFkfxZdLiGzH7y+yT1hoHqyPWskL8J2T/f8OskaNpn2unfSTOjUrzKTKwTH8wbguuLh/gl3J8nQ4E4jznljqYvw== 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, 15 Dec 2023 13:05:09 +0800 "Huang, Ying" wrote: > Andrew Morton writes: > > > tl;dr, what's the viewpoint on this patch now? > > > > I have a note here that we're hoping input from Johannes, Vlastimil and > > Mel (please). > > Michal has performance concerns. So, I think that we need to stop > scanning anon LRU if don't find enough page in swap cache at the tail of > the inactive list. OK, thanks, I'll make the v10 patch go away for now.