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=-8.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, MENTIONS_GIT_HOSTING,SPF_HELO_NONE,SPF_PASS autolearn=ham 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 88FEBC388F2 for ; Mon, 2 Nov 2020 09:27:58 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 2A87622275 for ; Mon, 2 Nov 2020 09:27:58 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=suse.com header.i=@suse.com header.b="VEOZnVeR" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728288AbgKBJ15 (ORCPT ); Mon, 2 Nov 2020 04:27:57 -0500 Received: from mx2.suse.de ([195.135.220.15]:40128 "EHLO mx2.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727953AbgKBJ14 (ORCPT ); Mon, 2 Nov 2020 04:27:56 -0500 X-Virus-Scanned: by amavisd-new at test-mx.suse.de DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.com; s=susede1; t=1604309275; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: in-reply-to:in-reply-to:references:references; bh=ZlskjhoYSfzJ/eJDetR1GZddrqtr18aAQLgNDYWBuaE=; b=VEOZnVeRCtmLaNTjY6K+BxZlP9bbWxc+cpUEFCW3qCVQJalwiAndxPMNSKpGx7jhkLWOiB dP0ioWLU3nHr/ac/ZhVFSVqsQoTQOr5ccgmUu//AbzgFZZyD3aP1s+SJ7v0iDrsjTWSnkT U33CKSBqbmVLctUpPE70xjewOTVVHJs= Received: from relay2.suse.de (unknown [195.135.221.27]) by mx2.suse.de (Postfix) with ESMTP id A55D5ABB2; Mon, 2 Nov 2020 09:27:55 +0000 (UTC) Date: Mon, 2 Nov 2020 10:27:54 +0100 From: Michal Hocko To: kernel test robot Cc: Waiman Long , Linus Torvalds , Andrew Morton , Shakeel Butt , Chris Down , Johannes Weiner , Roman Gushchin , Tejun Heo , Vladimir Davydov , Yafang Shao , LKML , lkp@lists.01.org, lkp@intel.com, ying.huang@intel.com, feng.tang@intel.com, zhengjun.xing@intel.com Subject: Re: [mm/memcg] bd0b230fe1: will-it-scale.per_process_ops -22.7% regression Message-ID: <20201102092754.GD22613@dhcp22.suse.cz> References: <20201102091543.GM31092@shao2-debian> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20201102091543.GM31092@shao2-debian> Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Mon 02-11-20 17:15:43, kernel test robot wrote: > Greeting, > > FYI, we noticed a -22.7% regression of will-it-scale.per_process_ops due to commit: > > > commit: bd0b230fe14554bfffbae54e19038716f96f5a41 ("mm/memcg: unify swap and memsw page counters") > https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git master I really fail to see how this can be anything else than a data structure layout change. There is one counter less. btw. are cgroups configured at all? What would be the configuration? -- Michal Hocko SUSE Labs