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=-4.2 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, USER_AGENT_SANE_2 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 53CB5C432BE for ; Sat, 7 Aug 2021 06:14:55 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 8F9A861158 for ; Sat, 7 Aug 2021 06:14:54 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org 8F9A861158 Authentication-Results: mail.kernel.org; dmarc=fail (p=quarantine dis=none) header.from=inbox.lv Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=kvack.org Received: by kanga.kvack.org (Postfix) id 99E066B006C; Sat, 7 Aug 2021 02:14:53 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 94EA66B0071; Sat, 7 Aug 2021 02:14:53 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 83C7C8D0001; Sat, 7 Aug 2021 02:14:53 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0010.hostedemail.com [216.40.44.10]) by kanga.kvack.org (Postfix) with ESMTP id 6BFD76B006C for ; Sat, 7 Aug 2021 02:14:53 -0400 (EDT) Received: from smtpin40.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay04.hostedemail.com (Postfix) with ESMTP id F00AA1D999 for ; Sat, 7 Aug 2021 06:14:52 +0000 (UTC) X-FDA: 78447271224.40.87880BF Received: from shark3.inbox.lv (shark3.inbox.lv [194.152.32.83]) by imf05.hostedemail.com (Postfix) with ESMTP id 2B96650367B6 for ; Sat, 7 Aug 2021 06:14:51 +0000 (UTC) Received: from shark3.inbox.lv (localhost [127.0.0.1]) by shark3-out.inbox.lv (Postfix) with ESMTP id 4860C2800E0; Sat, 7 Aug 2021 09:14:50 +0300 (EEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=inbox.lv; s=30062014; t=1628316890; bh=Ptap/6l1yZ7EnO/jIDCw2RESpsUNpoGTIwGUz06W0Gc=; h=Date:From:To:Cc:Subject:In-Reply-To:References; b=AQZNnGoAhYTSW2QNsWn0dhCY5G07WVDq7EPHtiwwi0KpvM5yo+c5zQd/8nQk/yLd4 g1hhkUqltPaNIXvVnlbB41RmZhQq+U1o+iZ0yVv9OCBbS/VcRMmWZxhzSA+sCuG9hr q5BwtI1NSCIJ49AJ/e79rzXxPHliPRx8T5G6oJj0= Received: from localhost (localhost [127.0.0.1]) by shark3-in.inbox.lv (Postfix) with ESMTP id 424A12800F5; Sat, 7 Aug 2021 09:14:50 +0300 (EEST) Received: from shark3.inbox.lv ([127.0.0.1]) by localhost (shark3.inbox.lv [127.0.0.1]) (spamfilter, port 35) with ESMTP id 7kLTAMNmrYQB; Sat, 7 Aug 2021 09:14:50 +0300 (EEST) Received: from mail.inbox.lv (pop1 [127.0.0.1]) by shark3-in.inbox.lv (Postfix) with ESMTP id 0F0412800E0; Sat, 7 Aug 2021 09:14:50 +0300 (EEST) Received: from mail.inbox.lv (unknown [79.105.9.99]) (Authenticated sender: hakavlad@inbox.lv) by mail.inbox.lv (Postfix) with ESMTPA id A4E043E6019B; Sat, 7 Aug 2021 09:14:47 +0300 (EEST) Date: Sat, 7 Aug 2021 15:14:24 +0900 From: Alexey Avramov To: Nico Pache Cc: linux-mm@kvack.org, akpm@linux-foundation.org, linux-kernel@vger.kernel.org, hannes@cmpxchg.org, aquini@redhat.com, shakeelb@google.com, llong@redhat.com Subject: Re: [PATCH v2] vm_swappiness=0 should still try to avoid swapping anon memory Message-ID: <20210807151424.76b4ee3a@mail.inbox.lv> In-Reply-To: <20210807022129.8842-1-npache@redhat.com> References: <20210807022129.8842-1-npache@redhat.com> X-Mailer: Claws Mail 3.14.1 (GTK+ 2.24.31; x86_64-pc-linux-gnu) MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-Virus-Scanned: OK X-ESPOL: EZeEAiZdhRsytcG4Kodl4OvixdOvJSku30Lmt9097ntHt7PErddreWaJeffiER4= Authentication-Results: imf05.hostedemail.com; dkim=pass header.d=inbox.lv header.s=30062014 header.b=AQZNnGoA; spf=pass (imf05.hostedemail.com: domain of hakavlad@inbox.lv designates 194.152.32.83 as permitted sender) smtp.mailfrom=hakavlad@inbox.lv; dmarc=pass (policy=quarantine) header.from=inbox.lv X-Rspamd-Server: rspam05 X-Rspamd-Queue-Id: 2B96650367B6 X-Stat-Signature: uxb4hnbz1q95acsqf9tzay3ym39j9frx X-HE-Tag: 1628316891-656881 X-Bogosity: Ham, tests=bogofilter, spamicity=0.002808, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: >vm_swappiness=0 should still try to avoid swapping anon memory Swapping with swappiness=0 depends on vm.watermark_scale_factor. Decrease vm.watermark_scale_factor to avoid swapping and get OOM, and increase vm.watermark_scale_factor to get successful swapping even with swappiness=0. Maybe I misunderstood you and you are solving some new problem?