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=-2.2 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, HEADER_FROM_DIFFERENT_DOMAINS,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 361A2C76191 for ; Thu, 18 Jul 2019 11:39:35 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id EC815217F4 for ; Thu, 18 Jul 2019 11:39:34 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=amazonses.com header.i=@amazonses.com header.b="FDFQtZ4z" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org EC815217F4 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=linux.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id AFCBA6B000A; Thu, 18 Jul 2019 07:39:33 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id A866F8E0001; Thu, 18 Jul 2019 07:39:33 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 94D916B000D; Thu, 18 Jul 2019 07:39:33 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from mail-qk1-f198.google.com (mail-qk1-f198.google.com [209.85.222.198]) by kanga.kvack.org (Postfix) with ESMTP id 6BDA46B000A for ; Thu, 18 Jul 2019 07:39:33 -0400 (EDT) Received: by mail-qk1-f198.google.com with SMTP id h198so22982128qke.1 for ; Thu, 18 Jul 2019 04:39:33 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:dkim-signature:date:from:to:cc:subject :in-reply-to:message-id:references:user-agent:mime-version :feedback-id; bh=3iT/OaO0Q2X3P8RhjupPqyY23NtLVrvRLicg+uM8g44=; b=Cmp+QBBcc/3RArx5nMtzu/FVWXhmezpGN4GPVKnZJ6P+F1UajibjkMwyppoNCfZQ4z 6Az9n+LmL+cSdwCM7oVRPnVOm7Pv+EztK5x83OX5sVLqOgtm5cO8Bp3oYzboFswhDDnP KEiDmEm1q2k6CIovIYYTywm553SLaMWXvuXYVvB6jrERp5c/luw8JApTdsBZibv8LjXW 58cuqRAPgr5uhGe3ixHV4mHX+Wewh3aGape3fhgmAU6hC7KRGjvTeo6W8+YVkA+agYTr w5B+JWS6u0FR/fCj2gqEDFRZNJZIFcf2QeyLKAFOX1YWxxI6sz42JQBto2Lqag0wbUNg 3zhg== X-Gm-Message-State: APjAAAXJ8I+7t7u/+VwjR2FpE0+cGVp1gJ6SoRrO+ExPMt6Swu6p/72J rDNaJXPDamuO80UZHzoCnEt/+TmQnH92VjdGSY6y2zwdQad8qGufcOGPdyK9jctzWujmnNngTE/ h+vUewUMx3w+hY7fIdpec4Rhvry2U/iDVdVFqw42TdvgY/laZMDNGmK2ovjXNXiM= X-Received: by 2002:a0c:d09c:: with SMTP id z28mr32235008qvg.149.1563449973250; Thu, 18 Jul 2019 04:39:33 -0700 (PDT) X-Google-Smtp-Source: APXvYqxVFi/BQYZhso/VGO5LkiPQOSu9HRm6Cmqdfqus3qGV007avhTO1yFtVt0ZNi48iD3PnfXp X-Received: by 2002:a0c:d09c:: with SMTP id z28mr32234974qvg.149.1563449972798; Thu, 18 Jul 2019 04:39:32 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1563449972; cv=none; d=google.com; s=arc-20160816; b=K2O5QQHq6gVw4IwKRsGwR//t1ne8IPkOVrvj/pHjFv/ERWpiCPtQjaJ6A46ynrBOBH hsQ4gKcRAux6peoAYW3sIAylA6wqLWO+CG60ZWm25zADnMAop5oG7DlqPmHfQhyQEkLT 1Vn0qcok7bRu+M1XfyFoNnyS6qJVu2P8BFpD2N6oeHb791DgaSMr6R9/S54Dcw8BdgkH kCXIxubuEV39dMgQwZ8mOhmerxaYIGAwzx7oTQvfSboZQPPWUrP0mRek+h+lXIMXo7B9 L2wQhwjybFH7PK5L+rwZWYCJ68hs6vFeMxotjYDRDB8HzE244TnvNbkhO136IUn7sQGP M8QA== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=feedback-id:mime-version:user-agent:references:message-id :in-reply-to:subject:cc:to:from:date:dkim-signature; bh=3iT/OaO0Q2X3P8RhjupPqyY23NtLVrvRLicg+uM8g44=; b=hA98DkR6oLo3PBgeGi6oZkTVEBC6by/2bILH57P8MJ9X6xhJ4lsekhWca9EKLt96Ff TAc1y3j/mXcrrBsaxdb2G3sBBlRNWrvJIrXMpaAAE0tvShx3U6pGH8cX2pRq419jI/hv O/n0iOLe4SoFRWEkrDCMsgKUp1hqg3wFuoiblAfYh0c3su6Of/52nm4gx0yp8gfwKDUR Kfch2YCqZ+09eIW0lY1nCXJQ9+/rgo3TikOcWQzjPpw9BkGko+ewuh8RWgFTADAGTajo TpdcB1i8UVIBPJymcGpOiGaFVqIHDqJBjLuVlTv4E4ZqYRSnRppNUv7hVavBCfg16ssV oqpw== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@amazonses.com header.s=6gbrjpgwjskckoa6a5zn6fwqkn67xbtw header.b=FDFQtZ4z; spf=pass (google.com: domain of 0100016c04e1562a-e516c595-1d46-40df-ab29-da1709277e9a-000000@amazonses.com designates 54.240.9.114 as permitted sender) smtp.mailfrom=0100016c04e1562a-e516c595-1d46-40df-ab29-da1709277e9a-000000@amazonses.com Received: from a9-114.smtp-out.amazonses.com (a9-114.smtp-out.amazonses.com. [54.240.9.114]) by mx.google.com with ESMTPS id z7si16781410qkb.134.2019.07.18.04.39.32 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Thu, 18 Jul 2019 04:39:32 -0700 (PDT) Received-SPF: pass (google.com: domain of 0100016c04e1562a-e516c595-1d46-40df-ab29-da1709277e9a-000000@amazonses.com designates 54.240.9.114 as permitted sender) client-ip=54.240.9.114; Authentication-Results: mx.google.com; dkim=pass header.i=@amazonses.com header.s=6gbrjpgwjskckoa6a5zn6fwqkn67xbtw header.b=FDFQtZ4z; spf=pass (google.com: domain of 0100016c04e1562a-e516c595-1d46-40df-ab29-da1709277e9a-000000@amazonses.com designates 54.240.9.114 as permitted sender) smtp.mailfrom=0100016c04e1562a-e516c595-1d46-40df-ab29-da1709277e9a-000000@amazonses.com DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/simple; s=6gbrjpgwjskckoa6a5zn6fwqkn67xbtw; d=amazonses.com; t=1563449972; h=Date:From:To:cc:Subject:In-Reply-To:Message-ID:References:MIME-Version:Content-Type:Feedback-ID; bh=3iT/OaO0Q2X3P8RhjupPqyY23NtLVrvRLicg+uM8g44=; b=FDFQtZ4zf6FgI43zUELi6/Zg+fvJYbr4Qi8Uy1KRexi8MISbZNS8UXYwlbwZtKjr ZIcLsvcRKg0taoqGZ17XIpRSbXCYzGRGkp10Y+jcpW8bkQDY7U0lVrCEYNhOxWMj9fc tr6WLHoRK9d2cxDtjdaAcHLtgqjGMyN9te7rG0NQ= Date: Thu, 18 Jul 2019 11:39:32 +0000 From: Christopher Lameter X-X-Sender: cl@nuc-kabylake To: Waiman Long cc: Pekka Enberg , David Rientjes , Joonsoo Kim , Andrew Morton , linux-mm@kvack.org, linux-kernel@vger.kernel.org, Michal Hocko , Roman Gushchin , Johannes Weiner , Shakeel Butt , Vladimir Davydov Subject: Re: [PATCH v2 2/2] mm, slab: Show last shrink time in us when slab/shrink is read In-Reply-To: <20190717202413.13237-3-longman@redhat.com> Message-ID: <0100016c04e1562a-e516c595-1d46-40df-ab29-da1709277e9a-000000@email.amazonses.com> References: <20190717202413.13237-1-longman@redhat.com> <20190717202413.13237-3-longman@redhat.com> User-Agent: Alpine 2.21 (DEB 202 2017-01-01) MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII X-SES-Outgoing: 2019.07.18-54.240.9.114 Feedback-ID: 1.us-east-1.fQZZZ0Xtj2+TD7V5apTT/NrT6QKuPgzCT/IC7XYgDKI=:AmazonSES 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, 17 Jul 2019, Waiman Long wrote: > The show method of /sys/kernel/slab//shrink sysfs file currently > returns nothing. This is now modified to show the time of the last > cache shrink operation in us. What is this useful for? Any use cases? > CONFIG_SLUB_DEBUG depends on CONFIG_SYSFS. So the new shrink_us field > is always available to the shrink methods. Aside from minimal systems without CONFIG_SYSFS... Does this build without CONFIG_SYSFS?