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 Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by smtp.lore.kernel.org (Postfix) with ESMTP id 57A7EC433F5 for ; Wed, 25 May 2022 01:31:54 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id E924F8D0003; Tue, 24 May 2022 21:31:53 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id E41D58D0002; Tue, 24 May 2022 21:31:53 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id D2F988D0003; Tue, 24 May 2022 21:31:53 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0010.hostedemail.com [216.40.44.10]) by kanga.kvack.org (Postfix) with ESMTP id C56D78D0002 for ; Tue, 24 May 2022 21:31:53 -0400 (EDT) Received: from smtpin17.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay10.hostedemail.com (Postfix) with ESMTP id 9335EBE5 for ; Wed, 25 May 2022 01:31:53 +0000 (UTC) X-FDA: 79502538906.17.8979DA5 Received: from out2.migadu.com (out2.migadu.com [188.165.223.204]) by imf07.hostedemail.com (Postfix) with ESMTP id BE02240035 for ; Wed, 25 May 2022 01:31:42 +0000 (UTC) Date: Tue, 24 May 2022 18:31:44 -0700 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.dev; s=key1; t=1653442310; 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=vkgpgq0MLg/tjJXAvXd1NI0cnHVkERy6akx7DcAkEY8=; b=IckRGymn51W5KSkNLGKDTL/8V3vl12R//mkoxvsoP3gyy98tW7DHo1FA4F0p1ga9sRz5TD 6FYxnT9//JecprFOB8jLgzbj00ug3+uTTxnUvnTh6E7aRsBziP72fgAqvxAnQoepov4Cae Dv4kVvVHCn1BGd7fheY1UI98MFBbRYM= X-Report-Abuse: Please report any abuse attempt to abuse@migadu.com and include these headers. From: Roman Gushchin To: Vasily Averin Cc: Andrew Morton , kernel@openvz.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, Shakeel Butt , Michal =?iso-8859-1?Q?Koutn=FD?= , Vlastimil Babka , Michal Hocko , cgroups@vger.kernel.org Subject: Re: [PATCH mm v2 9/9] memcg: enable accounting for percpu allocation of struct rt_rq Message-ID: References: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: X-Migadu-Flow: FLOW_OUT X-Migadu-Auth-User: linux.dev X-Rspamd-Server: rspam12 X-Rspamd-Queue-Id: BE02240035 X-Stat-Signature: fed6e8dpspyxdpdzsksqqnu6men4uene Authentication-Results: imf07.hostedemail.com; dkim=pass header.d=linux.dev header.s=key1 header.b=IckRGymn; spf=pass (imf07.hostedemail.com: domain of roman.gushchin@linux.dev designates 188.165.223.204 as permitted sender) smtp.mailfrom=roman.gushchin@linux.dev; dmarc=pass (policy=none) header.from=linux.dev X-Rspam-User: X-HE-Tag: 1653442302-334926 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 Sat, May 21, 2022 at 07:39:03PM +0300, Vasily Averin wrote: > If enabled in config, alloc_rt_sched_group() is called for each new > cpu cgroup and allocates a huge (~1700 bytes) percpu struct rt_rq. > This significantly exceeds the size of the percpu allocation in the > common part of cgroup creation. > > Memory allocated during new cpu cgroup creation > (with enabled RT_GROUP_SCHED): > common part: ~11Kb + 318 bytes percpu > cpu cgroup: ~2.5Kb + ~2800 bytes percpu > > Accounting for this memory helps to avoid misuse inside memcg-limited > contianers. > > Signed-off-by: Vasily Averin Acked-by: Roman Gushchin