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=-2.6 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, USER_AGENT_SANE_1 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 CA3DDC43603 for ; Tue, 17 Dec 2019 11:56:11 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 97B482082E for ; Tue, 17 Dec 2019 11:56:11 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1576583771; bh=UjKArH5+Euwue+fTOT6gVGJPYRgtFBYk9FMwizc4dXM=; h=Date:From:To:Cc:Subject:References:In-Reply-To:List-ID:From; b=0Af6wFEh+9zsCCfl/Mrkq8Izpc9AhLqCdP1KN0fpMOB8K1T75mp6/2SeM3zHJyBeo e2lDRM481TIq/5SdC7EBDjn8YSv+VeibptN6VaVUrCi77eJPrcjXsaTeZ7nyKgmJE6 shABo+JQE3g9AeMQtqB3wwjFm+4eS4CBRunC9JiU= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726852AbfLQL4K (ORCPT ); Tue, 17 Dec 2019 06:56:10 -0500 Received: from mail-wm1-f66.google.com ([209.85.128.66]:40242 "EHLO mail-wm1-f66.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726709AbfLQL4H (ORCPT ); Tue, 17 Dec 2019 06:56:07 -0500 Received: by mail-wm1-f66.google.com with SMTP id t14so2802711wmi.5 for ; Tue, 17 Dec 2019 03:56:06 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:from:to:cc:subject:message-id:references :mime-version:content-disposition:in-reply-to:user-agent; bh=tBfsCMjh1ETu4mPTqgM5m4FYVkLnpEWQJDTEOuEBWRw=; b=YsZheKiErf9J8bHuszkaTrjWxBi2UYRFDxZ4H3TD9/5eE6/R4GX1UCHBYK92bx71w0 7ezj9+bsXTI7jgT5oRO+wKeLBbGS4y1/oyvfrkKm6qP0ANU/AOB1KbwsyK2Avj+N6c0z lAbs2swVAeovQCFetkkm3GWVkg8S4NnTmgfk/brEr687g4BGS24BjevRktmgUihYCQse GppEtHCx4v1V1Iwq2p2E6WojYd6qi5AovrSr1EtkU9X5nRkGZ9j/PmB8NsBM+rkX3B46 2JTQWz9nKKVp8XdHXD/mpJdi6BxbEQV4nlTiJqP6b4PJdZeKKibZvQRgZFuorRyWCif1 Ir9A== X-Gm-Message-State: APjAAAUUOkmdcKJ9dzooIcSXlF6TTwhqema1wuNNtav3HflaERC0dWnC qIxKk2XYnGo07DhjhRDqtnI= X-Google-Smtp-Source: APXvYqyYFTVfGZu2J7p0OrIg09Dwz5eFI6PsMuysdoIJMBZ0kOkQ1SsHnOZSXe51f6W7R63viLe3SA== X-Received: by 2002:a7b:c19a:: with SMTP id y26mr5016121wmi.152.1576583766141; Tue, 17 Dec 2019 03:56:06 -0800 (PST) Received: from localhost (prg-ext-pat.suse.com. [213.151.95.130]) by smtp.gmail.com with ESMTPSA id n3sm2819398wmc.27.2019.12.17.03.56.04 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 17 Dec 2019 03:56:05 -0800 (PST) Date: Tue, 17 Dec 2019 12:56:03 +0100 From: Michal Hocko To: Yafang Shao Cc: hannes@cmpxchg.org, vdavydov.dev@gmail.com, akpm@linux-foundation.org, viro@zeniv.linux.org.uk, linux-mm@kvack.org, linux-fsdevel@vger.kernel.org Subject: Re: [PATCH 0/4] memcg, inode: protect page cache from freeing inode Message-ID: <20191217115603.GA10016@dhcp22.suse.cz> References: <1576582159-5198-1-git-send-email-laoar.shao@gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1576582159-5198-1-git-send-email-laoar.shao@gmail.com> User-Agent: Mutt/1.10.1 (2018-07-13) Sender: linux-fsdevel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-fsdevel@vger.kernel.org On Tue 17-12-19 06:29:15, Yafang Shao wrote: > On my server there're some running MEMCGs protected by memory.{min, low}, > but I found the usage of these MEMCGs abruptly became very small, which > were far less than the protect limit. It confused me and finally I > found that was because of inode stealing. What do you mean by this exactly. Are those inodes reclaimed by the regular memory reclaim or by other means? Because shrink_node does exclude shrinking slab for protected memcgs. -- Michal Hocko SUSE Labs