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 2ADA5C4332F for ; Wed, 13 Dec 2023 02:06:17 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 991548D0013; Tue, 12 Dec 2023 21:06:16 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id 940438D0009; Tue, 12 Dec 2023 21:06:16 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 7C46C8D0013; Tue, 12 Dec 2023 21:06:16 -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 6872B8D0009 for ; Tue, 12 Dec 2023 21:06:16 -0500 (EST) Received: from smtpin10.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay02.hostedemail.com (Postfix) with ESMTP id 39C78120AAD for ; Wed, 13 Dec 2023 02:06:16 +0000 (UTC) X-FDA: 81560155152.10.AFBA707 Received: from mail-qt1-f177.google.com (mail-qt1-f177.google.com [209.85.160.177]) by imf24.hostedemail.com (Postfix) with ESMTP id 6ED56180013 for ; Wed, 13 Dec 2023 02:06:14 +0000 (UTC) Authentication-Results: imf24.hostedemail.com; dkim=pass header.d=google.com header.s=20230601 header.b=ZzYHPv0Q; dmarc=pass (policy=reject) header.from=google.com; spf=pass (imf24.hostedemail.com: domain of yuzhao@google.com designates 209.85.160.177 as permitted sender) smtp.mailfrom=yuzhao@google.com ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1702433174; 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=8w1+yfAr2SPzVB4dpYvx6YaKAjN+fhfuOqchPg5V3ac=; b=ZQ6pEXNTgC6Fxr3JsZMkHSObKRMuXyi6TLya1+9vMG9LP8OtBDWAica4r34ahzvk0CPslv 7YfH4dJP56tHfZQC9Okww4WxPa3sYoH0cwF38mR/SSdmeIBddxQCi+VlfxmOjhvX98oTVg vXzqWi/4yu52gQrrly8ynxdCNZPBfWQ= ARC-Authentication-Results: i=1; imf24.hostedemail.com; dkim=pass header.d=google.com header.s=20230601 header.b=ZzYHPv0Q; dmarc=pass (policy=reject) header.from=google.com; spf=pass (imf24.hostedemail.com: domain of yuzhao@google.com designates 209.85.160.177 as permitted sender) smtp.mailfrom=yuzhao@google.com ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1702433174; a=rsa-sha256; cv=none; b=3MWeA8PDXrGyAXKekODx0uApeso7tNoUM+CHHa9Li+QLaTwc5//YH/LEnekPJAh9vRINVK b7/mxvFSw4Q+FiYNSQ4DnQEJsmQjL+Yy879zJfATBqSj81skr59D69R0Ktug58T15Oxzjv zSX4RIVg/YPCmoI4UL7cony8ZNdSY9A= Received: by mail-qt1-f177.google.com with SMTP id d75a77b69052e-42598c2b0b7so93711cf.1 for ; Tue, 12 Dec 2023 18:06:14 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20230601; t=1702433173; x=1703037973; darn=kvack.org; h=content-transfer-encoding:cc:to:subject:message-id:date:from :in-reply-to:references:mime-version:from:to:cc:subject:date :message-id:reply-to; bh=8w1+yfAr2SPzVB4dpYvx6YaKAjN+fhfuOqchPg5V3ac=; b=ZzYHPv0Q2eWkhlC1h2Cd35DVI9e66JNRGole183fQyNCnolUGAiBsMuf5xhEiV2Nf6 T3xwV2MsLPyhFcIj3RAhJwk+WheV0Ja4F1MPW3cTgZTuFFzi7vFcRo1lzwK1IPsZ5UuN MkkrSnckJ6P8V/4Tc2WpymicdF17TPDXLzt59CQx0HshzEqTylYkimZXhDuJ33iUNUaW VqCc91TwW2jnIX+CpOZgP3/5ii5lLMq3NLXymPRrJPBVnw0F3BlrG3C+1HkFo/OlPblm amiirtbzdsK568qItl1aERkXVfWmbKUIDqaCw0xP5eBSQQKPaZRppzF36gyctk4RJLW8 eTFg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1702433173; x=1703037973; h=content-transfer-encoding:cc:to:subject:message-id:date:from :in-reply-to:references:mime-version:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=8w1+yfAr2SPzVB4dpYvx6YaKAjN+fhfuOqchPg5V3ac=; b=wjVzsvtO2n+1gsXe4IOwQP9Fc3yIgVTJszuqJBQkApadJj+00sBXNyvEyztyfWorfX 8Sqw3RWGcm5cgKpgnBoBFGZZyqbHf2RkQ9Uir8iIgOaHK6M0JrcrXecYHRMd/ryom30q SNQaDHsvVZUDjFwL/8clyhZFyhQyptEhJOkuR7bukUK0SSQN8fdwUPZGUByO0Y5v9Xj/ fF9oRtVHLcbc22yGw6jra0I25VNiMa6U/okUvP4ZWwZkQsYnroCQaJ2ydrzR9XtylgL1 +YR+5k+q64HHYsB2h+n7D78Bf74yfG+CYubdbWt7ukMf6/p6lKC2SPH1C2LA2fY6l6YT rcYA== X-Gm-Message-State: AOJu0YwNfX4fckz9dhY0QdYEviQf+Rl/XJPGj0HnMzjllg0txF2kb+Xe We92eQ6By6879k0VKSYN3IZ2mwlG6DIMORvGcMM1PztaLrNh/lheod4= X-Google-Smtp-Source: AGHT+IG3y4UdjpV0X9gFbF4eOb8+BdZkR190RHWRGUNro5VSrV3slPFDuCaeH/KRi7c4WLSMSpvCPYZ95Vd4vDp2clc= X-Received: by 2002:a05:622a:303:b0:41e:36cd:4284 with SMTP id q3-20020a05622a030300b0041e36cd4284mr1355674qtw.6.1702433173482; Tue, 12 Dec 2023 18:06:13 -0800 (PST) MIME-Version: 1.0 References: <20231213013807.897742-1-schatzberg.dan@gmail.com> <20231213013807.897742-3-schatzberg.dan@gmail.com> In-Reply-To: <20231213013807.897742-3-schatzberg.dan@gmail.com> From: Yu Zhao Date: Tue, 12 Dec 2023 19:05:36 -0700 Message-ID: Subject: Re: [PATCH V4 2/2] mm: add swapiness= arg to memory.reclaim To: Dan Schatzberg Cc: Johannes Weiner , Roman Gushchin , Yosry Ahmed , Huan Yang , linux-kernel@vger.kernel.org, cgroups@vger.kernel.org, linux-mm@kvack.org, Tejun Heo , Zefan Li , Jonathan Corbet , Michal Hocko , Shakeel Butt , Muchun Song , Andrew Morton , David Hildenbrand , Matthew Wilcox , Kefeng Wang , Yue Zhao , Hugh Dickins Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Rspam-User: X-Rspamd-Server: rspam12 X-Rspamd-Queue-Id: 6ED56180013 X-Stat-Signature: kjmzehaurs5x7pyn1cmj6d14j36e8jhq X-HE-Tag: 1702433174-195308 X-HE-Meta: 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 tGUSdjZ3 mL+tghEgLlnNEAh3vvDSyqDlwXfICPh1P7P0BjZL0EMvvdmf4KhuGxpcKsj4slvGmzI6r/LA5WsmFF+9XkOckqB+VGK4VEFhop3+zGzzLejtuHDLaSjAP04rsS0yAWq+lpFDxbi/w6uKoplNOIrtCmyLWt+UaNrE1W2f0b0GRP318SgU3QpR4NZ45mWm0VSOkzD0pkIZSuZI8+mH2SsT4VT6pJ7afqBgBl478W3F2nrRp8lQY1QK+u/tZKc87YzP35famkHP9XgMtZmkFk+1hbArvquHHGfOuGQlGW99n8Tyck0ySKX9CQ/7YiYZSzkvEItf4Yj90mh0hCixaYZu6iAIZEmCnCOh9E4U6kfaPo3S3TwrjTFktqDQwWw== 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 Tue, Dec 12, 2023 at 6:39=E2=80=AFPM Dan Schatzberg wrote: > > Allow proactive reclaimers to submit an additional swappiness=3D > argument to memory.reclaim. This overrides the global or per-memcg > swappiness setting for that reclaim attempt. > > For example: > > echo "2M swappiness=3D0" > /sys/fs/cgroup/memory.reclaim > > will perform reclaim on the rootcg with a swappiness setting of 0 (no > swap) regardless of the vm.swappiness sysctl setting. > > Signed-off-by: Dan Schatzberg NAK. Please initialize new variables properly and test code changes thoroughly before submission.