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 95099C432C3 for ; Wed, 27 Nov 2019 17:43:22 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 612DD2080F for ; Wed, 27 Nov 2019 17:43:22 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 612DD2080F 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 03A2B6B04D9; Wed, 27 Nov 2019 12:43:22 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id F2CC36B04DA; Wed, 27 Nov 2019 12:43:21 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id E424B6B04DB; Wed, 27 Nov 2019 12:43:21 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0190.hostedemail.com [216.40.44.190]) by kanga.kvack.org (Postfix) with ESMTP id CB2756B04D9 for ; Wed, 27 Nov 2019 12:43:21 -0500 (EST) Received: from smtpin25.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay05.hostedemail.com (Postfix) with SMTP id 7FC6A181AEF09 for ; Wed, 27 Nov 2019 17:43:21 +0000 (UTC) X-FDA: 76202779002.25.start38_577c83bcb962a X-HE-Tag: start38_577c83bcb962a X-Filterd-Recvd-Size: 3064 Received: from mail-wm1-f67.google.com (mail-wm1-f67.google.com [209.85.128.67]) by imf48.hostedemail.com (Postfix) with ESMTP for ; Wed, 27 Nov 2019 17:43:21 +0000 (UTC) Received: by mail-wm1-f67.google.com with SMTP id f129so8564695wmf.2 for ; Wed, 27 Nov 2019 09:43:21 -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=tSJWGvRdO6CDjk2KxjQwZuJhy9Tg5L6rOZn+ujJ/7s0=; b=YAirj1JcIkxqQ3pq6Fbd6SrLuTbz3lEZBKCZzJ4+YW9OIKvPGFAfq4665W+ZqpQP+5 Wx58rxAkNjRecO4oR17XZcGgNVP3K4/t9KSPwLzq5sbuqcks0VVL00z9rGzYN5f0Izil zakFyEKQKtglZ/D+5/NHo9jmOne5YFUrzsRsaohAa+1PlO0TlEeztxbu/1BwF9QC2On1 qhBL4TvOlQsw9RcsdQSf8qz/ZMPjkahseoD8C/+csur5C6QC0TpGx9H8gTssCH6UbPck b7iKK3wCmg21CZDHRyFh7w00WqVBgDYdMOhGEA4UMU2Ox/wNRKpmdu/vxAF1fAH82tx2 uSow== X-Gm-Message-State: APjAAAUHmPFjqazAQXDBsGSlEzTkNENLkbfvCSEzZJEbqX8cMFy3MiAK 6muYYrbALTa3tUUDH5S9ng8= X-Google-Smtp-Source: APXvYqzv9kcJZil504sQkm/RB2JOZoRsmDokWfG9DlfgoAOwM/RjtikAFwIH+MsDscDTE8hWf/AQJA== X-Received: by 2002:a1c:7d01:: with SMTP id y1mr5341026wmc.157.1574876600033; Wed, 27 Nov 2019 09:43:20 -0800 (PST) Received: from localhost (ip-37-188-137-84.eurotel.cz. [37.188.137.84]) by smtp.gmail.com with ESMTPSA id t12sm2235062wrs.96.2019.11.27.09.43.18 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 27 Nov 2019 09:43:19 -0800 (PST) Date: Wed, 27 Nov 2019 18:43:17 +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: <20191127174317.GD26807@dhcp22.suse.cz> References: <20191126121901.GE20912@dhcp22.suse.cz> <20191126165420.GL20912@dhcp22.suse.cz> <20191127162400.GT20912@dhcp22.suse.cz> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.10.1 (2018-07-13) 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 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. -- Michal Hocko SUSE Labs