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=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 8706DC2D0DB for ; Mon, 27 Jan 2020 23:04:55 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 49F2D2087F for ; Mon, 27 Jan 2020 23:04:55 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 49F2D2087F 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 D3C186B0003; Mon, 27 Jan 2020 18:04:54 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id CED926B0006; Mon, 27 Jan 2020 18:04:54 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id BDD4A6B0007; Mon, 27 Jan 2020 18:04:54 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0168.hostedemail.com [216.40.44.168]) by kanga.kvack.org (Postfix) with ESMTP id A8EA56B0003 for ; Mon, 27 Jan 2020 18:04:54 -0500 (EST) Received: from smtpin12.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay01.hostedemail.com (Postfix) with SMTP id 7FB2A180AD802 for ; Mon, 27 Jan 2020 23:04:54 +0000 (UTC) X-FDA: 76424946108.12.prose11_2ad14b3b3b949 X-HE-Tag: prose11_2ad14b3b3b949 X-Filterd-Recvd-Size: 2605 Received: from gentwo.org (gentwo.org [3.19.106.255]) by imf36.hostedemail.com (Postfix) with ESMTP for ; Mon, 27 Jan 2020 23:04:54 +0000 (UTC) Received: by gentwo.org (Postfix, from userid 1002) id 7C85D3F25A; Mon, 27 Jan 2020 23:04:53 +0000 (UTC) Received: from localhost (localhost [127.0.0.1]) by gentwo.org (Postfix) with ESMTP id 7B7BE3E9B5; Mon, 27 Jan 2020 23:04:53 +0000 (UTC) Date: Mon, 27 Jan 2020 23:04:53 +0000 (UTC) From: Christopher Lameter X-X-Sender: cl@www.lameter.com To: =?ISO-8859-15?Q?Michal_Koutn=FD?= cc: Andrew Morton , Michal Hocko , LKML , linux-mm@kvack.org Subject: Re: SLUB: purpose of sysfs events on cache creation/removal In-Reply-To: <20200127173336.GB17425@blackbody.suse.cz> Message-ID: References: <20191204153225.GM25242@dhcp22.suse.cz> <20191204173224.GN25242@dhcp22.suse.cz> <20200106115733.GH12699@dhcp22.suse.cz> <20200109145236.GS4951@dhcp22.suse.cz> <20200109114415.cf01bd3ad30c5c4aec981653@linux-foundation.org> <20200117171331.GA17179@blackbody.suse.cz> <20200118161528.94dc18c074aeaa384200486b@linux-foundation.org> <20200127173336.GB17425@blackbody.suse.cz> User-Agent: Alpine 2.21 (DEB 202 2017-01-01) MIME-Version: 1.0 Content-Type: multipart/mixed; boundary="531401748-106161774-1580166293=:25307" X-Bogosity: Ham, tests=bogofilter, spamicity=0.000029, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: This message is in MIME format. The first part should be readable text, while the remaining parts are likely unreadable without MIME-aware tools. --531401748-106161774-1580166293=:25307 Content-Type: text/plain; charset=ISO-8859-15 Content-Transfer-Encoding: quoted-printable On Mon, 27 Jan 2020, Michal Koutn=FD wrote: > When I rerun the script with patched kernel, udev sit mostly idle (ther= e > were no other udev event sources). So the number can be said to drop to > 0% CPU time / event/s. > > > Typically the author, but not always. If someone else is particularl= y > > motivated to get a patch merged up they can take it over. > Christopher, do you consider resending your patch? (I second that it > exposes the internal details (wrt cgroup caches) and I can observe the > just reading the events by udevd wastes CPU time.) The patch exposes details of cgroup caches? Which patch are we talking about? --531401748-106161774-1580166293=:25307--