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 AD96AC433F5 for ; Thu, 26 May 2022 03:46:33 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 170A58D0003; Wed, 25 May 2022 23:46:33 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 123048D0002; Wed, 25 May 2022 23:46:33 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 037178D0003; Wed, 25 May 2022 23:46:32 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0012.hostedemail.com [216.40.44.12]) by kanga.kvack.org (Postfix) with ESMTP id E71768D0002 for ; Wed, 25 May 2022 23:46:32 -0400 (EDT) Received: from smtpin09.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay07.hostedemail.com (Postfix) with ESMTP id A906E202D4 for ; Thu, 26 May 2022 03:46:32 +0000 (UTC) X-FDA: 79506507024.09.206C33B Received: from mail-pf1-f172.google.com (mail-pf1-f172.google.com [209.85.210.172]) by imf25.hostedemail.com (Postfix) with ESMTP id D0BD0A000F for ; Thu, 26 May 2022 03:46:01 +0000 (UTC) Received: by mail-pf1-f172.google.com with SMTP id x143so657421pfc.11 for ; Wed, 25 May 2022 20:46:30 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bytedance-com.20210112.gappssmtp.com; s=20210112; h=date:from:to:cc:subject:message-id:references:mime-version :content-disposition:in-reply-to; bh=jom1KNUFUVbdHI4yDCgycgylXLvzpYU5cnGJu6js2CM=; b=MMRNUHP/S8UsNnp5EuPIxQHhG8BxklSE0xitelM4Vg7GNPTndJ46XLTWbPnLeGrakA HjxaBvB9CVdpU++lWFhFVi0hQqi7XBEeBFJb1FmKXIr+h1mB2EKMXZFz1mk0SEq8VjWT R1tc4Ky4e6KwB5Vo848Wnai0OpxR/X1nTf0iMNrgLyMU6q7n7mA5X8YtWLfcHAeHDBDE U+JOWvfI/IlcjenYh/3rRmJtTzyHB1v2XgEjqyovAEbIPpcMjB4QP8y/dvtqQmSsPQqa 5rCwn+uwTKxRosFLjRi2V7NRMrmRN5WXvExI48SNZzKaGvLRMnke/CoQ8QghFYZWFWO8 6Y1g== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:date:from:to:cc:subject:message-id:references :mime-version:content-disposition:in-reply-to; bh=jom1KNUFUVbdHI4yDCgycgylXLvzpYU5cnGJu6js2CM=; b=L7Zz0cssSDECfxlpTukjJS6VRKowseZK5ZRg2djANpYkMcCwa9Oqh43bsXXWYziMTB geadfU7hrgAtl1Tzsos/WGElxoUAj5b/exnhFagM3hrEo8+YuQF2itBVNqoAeeoVsy7H Gp9TfhHV6vkvT0L7elurt4PONmYImnDLGW1COAznJ9VbMcN0De4qubdVQQstzhyqe3mo /Zu/k93ZVQCAtkRQ8c+kyI0t5sPCUv+D3FJ0/XSYIDehvU3guObfa2+ap+FZJPRGgioj ZU8jFswisIFKmvHyv7eh1MSVA0F6l7ZLVHQwPGPASGT4khu/UcgW89EDHhFBTO18FG3K CJyw== X-Gm-Message-State: AOAM530cRWBqAqilTSF0CJQvIIXcNvyP9D/U0hOerA74oGdeeBPWu6vr MsQUocsbva6pCUX+onCdNao/LQ== X-Google-Smtp-Source: ABdhPJxHOE/pVLHhv1OtO2tl/SSozB2v4lqIXw8a0u47UCTL/a5IU2HljI/TZse4Ei170dqVSM8sdw== X-Received: by 2002:a63:83c6:0:b0:3fa:4034:57e3 with SMTP id h189-20020a6383c6000000b003fa403457e3mr16440355pge.177.1653536789612; Wed, 25 May 2022 20:46:29 -0700 (PDT) Received: from localhost ([2408:8207:18da:2310:c40c:3e14:bb57:48be]) by smtp.gmail.com with ESMTPSA id je3-20020a170903264300b0015e8d4eb249sm200094plb.147.2022.05.25.20.46.27 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 25 May 2022 20:46:29 -0700 (PDT) Date: Thu, 26 May 2022 11:46:23 +0800 From: Muchun Song To: Roman Gushchin Cc: Andrew Morton , linux-mm@kvack.org, Dave Chinner , linux-kernel@vger.kernel.org, Kent Overstreet , Hillf Danton , Christophe JAILLET Subject: Re: [PATCH v4 6/6] mm: shrinkers: add scan interface for shrinker debugfs Message-ID: References: <20220525202600.2910982-1-roman.gushchin@linux.dev> <20220525202600.2910982-7-roman.gushchin@linux.dev> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20220525202600.2910982-7-roman.gushchin@linux.dev> X-Rspam-User: X-Rspamd-Queue-Id: D0BD0A000F X-Stat-Signature: 1exh43qtgkcs897jqcp47tgzmi376ubk Authentication-Results: imf25.hostedemail.com; dkim=pass header.d=bytedance-com.20210112.gappssmtp.com header.s=20210112 header.b="MMRNUHP/"; dmarc=pass (policy=none) header.from=bytedance.com; spf=pass (imf25.hostedemail.com: domain of songmuchun@bytedance.com designates 209.85.210.172 as permitted sender) smtp.mailfrom=songmuchun@bytedance.com X-Rspamd-Server: rspam04 X-HE-Tag: 1653536761-685626 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: On Wed, May 25, 2022 at 01:26:00PM -0700, Roman Gushchin wrote: > Add a scan interface which allows to trigger scanning of a particular > shrinker and specify memcg and numa node. It's useful for testing, > debugging and profiling of a specific scan_objects() callback. > Unlike alternatives (creating a real memory pressure and dropping > caches via /proc/sys/vm/drop_caches) this interface allows to interact > with only one shrinker at once. Also, if a shrinker is misreporting > the number of objects (as some do), it doesn't affect scanning. > > Signed-off-by: Roman Gushchin Acked-by: Muchun Song Thanks.