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=-2.5 required=3.0 tests=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 45AA6C43603 for ; Wed, 4 Dec 2019 13:28:17 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 129C22077B for ; Wed, 4 Dec 2019 13:28:17 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 129C22077B Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=kernel.org Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id B6A966B0AC3; Wed, 4 Dec 2019 08:28:16 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id B1AEA6B0AC4; Wed, 4 Dec 2019 08:28:16 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id A315C6B0AC5; Wed, 4 Dec 2019 08:28:16 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0110.hostedemail.com [216.40.44.110]) by kanga.kvack.org (Postfix) with ESMTP id 8B6736B0AC3 for ; Wed, 4 Dec 2019 08:28:16 -0500 (EST) Received: from smtpin29.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay02.hostedemail.com (Postfix) with SMTP id 3F75652A8 for ; Wed, 4 Dec 2019 13:28:16 +0000 (UTC) X-FDA: 76227537792.29.dress60_def933ed525d X-HE-Tag: dress60_def933ed525d X-Filterd-Recvd-Size: 3205 Received: from mail-wr1-f68.google.com (mail-wr1-f68.google.com [209.85.221.68]) by imf34.hostedemail.com (Postfix) with ESMTP for ; Wed, 4 Dec 2019 13:28:15 +0000 (UTC) Received: by mail-wr1-f68.google.com with SMTP id j42so8540666wrj.12 for ; Wed, 04 Dec 2019 05:28:15 -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=+umYpmj3RQMgtbzhJoN9gGSxfzKMbRv2glQbXHfZy4o=; b=FMMOvDQqQf0//drki09cNEfPPzUOlPe/I7AbMyS0jwnz3Pfk4uUOfRyk9bf6gzLgu+ ym8tDUoaWllCZT8t8zaY8yzJ4Zg+MQ4LalkD7F7XLjAmgOfghlZlu9jl+YwD2b1WjNCa B+a7JW6CW9+b3Vd5HSUwRrtRkXvVB51jRjFvMkd6VWpUtdtMivSgxT2n8ppD8m2/nrQL bK6BihvL2zMrR7cVnVKiEY4/n8MAhZnh502WzbhzVosYtv9KdfEZFaRIFsdjNEjtPxv1 4IzROmh7S6ADsz1RhZ72n39XXEaezxjgb8WSDJnHqx604lBy8Cv7oZPFv7kMS8zkL8Lk JCcQ== X-Gm-Message-State: APjAAAX3Ta/hQ+i3TunCEXXucB2IIiiSvdplTde7ZtTLGFWLWUODAtej Srn15UroDaTsfsWLa3tPsD8= X-Google-Smtp-Source: APXvYqwBQ4xYTm6PxE2YxFS/RKJtRVFg1psBTqCj/aLhBIfASHzQOS5JBH1XqkdNtWXLUIAQQDvigg== X-Received: by 2002:a5d:6144:: with SMTP id y4mr4119206wrt.367.1575466094463; Wed, 04 Dec 2019 05:28:14 -0800 (PST) Received: from localhost (prg-ext-pat.suse.com. [213.151.95.130]) by smtp.gmail.com with ESMTPSA id c1sm6273706wmk.22.2019.12.04.05.28.12 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 04 Dec 2019 05:28:12 -0800 (PST) Date: Wed, 4 Dec 2019 14:28:12 +0100 From: Michal Hocko To: Christopher Lameter Cc: LKML , linux-mm@kvack.org Subject: Re: SLUB: purpose of sysfs events on cache creation/removal Message-ID: <20191204132812.GF25242@dhcp22.suse.cz> References: <20191126121901.GE20912@dhcp22.suse.cz> <20191126165420.GL20912@dhcp22.suse.cz> <20191127162400.GT20912@dhcp22.suse.cz> <20191127174317.GD26807@dhcp22.suse.cz> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20191127174317.GD26807@dhcp22.suse.cz> User-Agent: Mutt/1.10.1 (2018-07-13) X-Bogosity: Ham, tests=bogofilter, spamicity=0.000003, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: On Wed 27-11-19 18:43:17, Michal Hocko wrote: > On Wed 27-11-19 16:26:11, Cristopher Lameter wrote: > > On Wed, 27 Nov 2019, Michal Hocko wrote: > > > > > Would you mind a patch that would add a kernel command line parameter > > > that would work like memcg_sysfs_enabled? The default for the config > > > would be on. Or it would be preferrable to simply drop only events? > > > > Just drop the events may be best. Then we know if someone is using it. > > I would be worried that a lack of events might be surprising and a > potential userspace wouldn't know that something has changed. It would be great to land with some decision here. -- Michal Hocko SUSE Labs