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 144CAC43334 for ; Thu, 23 Jun 2022 16:08:00 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id A4F7C8E015E; Thu, 23 Jun 2022 12:07:59 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id A01438E0144; Thu, 23 Jun 2022 12:07:59 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 8EF118E015E; Thu, 23 Jun 2022 12:07:59 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0014.hostedemail.com [216.40.44.14]) by kanga.kvack.org (Postfix) with ESMTP id 826A08E0144 for ; Thu, 23 Jun 2022 12:07:59 -0400 (EDT) Received: from smtpin02.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay07.hostedemail.com (Postfix) with ESMTP id 19969213E0 for ; Thu, 23 Jun 2022 16:07:59 +0000 (UTC) X-FDA: 79609981878.02.5BA5BCF Received: from smtp-out2.suse.de (smtp-out2.suse.de [195.135.220.29]) by imf21.hostedemail.com (Postfix) with ESMTP id 8108C1C0019 for ; Thu, 23 Jun 2022 16:07:58 +0000 (UTC) Received: from relay2.suse.de (relay2.suse.de [149.44.160.134]) by smtp-out2.suse.de (Postfix) with ESMTP id 0A0131F747; Thu, 23 Jun 2022 16:07:57 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.com; s=susede1; t=1656000477; h=from:from:reply-to: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=wMF9zQXoS7789benC3y1Mqff9+pXyWjyfnVX7+d4uIU=; b=mvvikz1x06mAR0j9AIIjqZez94lYbuacM/0nvGLHh9QkoXhZ0Bgz3bcqKQylfvDVab1ffl fs5NfryGLmDNt9mFXbPF8S/1L9pyATCAiB9FP7RkBv2Nhdqo1yCiRNngO6aqd++vLOKIUx RwGAngJGkZvbsOT99UE2700SeBZB+E4= Received: from suse.cz (unknown [10.100.201.86]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by relay2.suse.de (Postfix) with ESMTPS id 52EBA2C197; Thu, 23 Jun 2022 16:07:56 +0000 (UTC) Date: Thu, 23 Jun 2022 18:07:55 +0200 From: Michal Hocko To: Vasily Averin Cc: kernel@openvz.org, Andrew Morton , linux-kernel@vger.kernel.org, linux-mm@kvack.org, Shakeel Butt , Roman Gushchin , Michal =?iso-8859-1?Q?Koutn=FD?= , Vlastimil Babka , Muchun Song , cgroups@vger.kernel.org Subject: Re: [PATCH mm v5 0/9] memcg: accounting for objects allocated by mkdir, cgroup Message-ID: References: <4e685057-b07d-745d-fdaa-1a6a5a681060@openvz.org> <0fe836b4-5c0f-0e32-d511-db816d359748@openvz.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1656000478; a=rsa-sha256; cv=none; b=BysEr/m+cOYPrZ8K2B80lyawAf6+Q2lpaiFS+FG9F3L0sv5t+O59DZauqU/o09T/Y5UoBk tdQfEKBPwgEwIqBAyeqsNsGch5AUIv57+n7Nu4k0MzpLresuc6Ja4djrBxNNlJ4y7uFirf vXLtAtAWyhLuX2QUSBOQ6tfwQ820j+0= ARC-Authentication-Results: i=1; imf21.hostedemail.com; dkim=pass header.d=suse.com header.s=susede1 header.b=mvvikz1x; dmarc=pass (policy=quarantine) header.from=suse.com; spf=pass (imf21.hostedemail.com: domain of mhocko@suse.com designates 195.135.220.29 as permitted sender) smtp.mailfrom=mhocko@suse.com ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1656000478; h=from:from:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-type:content-transfer-encoding: in-reply-to:in-reply-to:references:references:dkim-signature; bh=wMF9zQXoS7789benC3y1Mqff9+pXyWjyfnVX7+d4uIU=; b=bL4UUWMe2nUFtfSN+YsbltUVDXlPC/EEorjPPB93lA2h8bI4W/tr5AkSeZKdpGZauKcLAQ V3TLFi5xIKEZfeGb54F/hUn4lhzC5qBBlakD14ja3/28HITlWQm+MZ3h9im/bv6EeQnObi RdxaN5WgXn9WzTRYFS86V/5eahExNAg= X-Rspamd-Queue-Id: 8108C1C0019 X-Rspam-User: Authentication-Results: imf21.hostedemail.com; dkim=pass header.d=suse.com header.s=susede1 header.b=mvvikz1x; dmarc=pass (policy=quarantine) header.from=suse.com; spf=pass (imf21.hostedemail.com: domain of mhocko@suse.com designates 195.135.220.29 as permitted sender) smtp.mailfrom=mhocko@suse.com X-Rspamd-Server: rspam03 X-Stat-Signature: cpmxnz6pkzsuiyho9m4rdxcennko8wb4 X-HE-Tag: 1656000478-457439 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 Thu 23-06-22 18:03:31, Vasily Averin wrote: > Dear Michal, > do you still have any concerns about this patch set? Yes, I do not think we have concluded this to be really necessary. IIRC Roman would like to see lingering cgroups addressed in not-so-distant future (http://lkml.kernel.org/r/Ypd2DW7id4M3KJJW@carbon) and we already have a limit for the number of cgroups in the tree. So why should we chase after allocations that correspond the cgroups and somehow try to cap their number via the memory consumption. This looks like something that will get out of sync eventually and it also doesn't seem like the best control to me (comparing to an explicit limit to prevent runaways). -- Michal Hocko SUSE Labs