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 153B8C433EF for ; Mon, 30 May 2022 15:06:48 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 867726B0071; Mon, 30 May 2022 11:06:47 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 816406B0072; Mon, 30 May 2022 11:06:47 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 700BA6B0073; Mon, 30 May 2022 11:06:47 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0016.hostedemail.com [216.40.44.16]) by kanga.kvack.org (Postfix) with ESMTP id 62D666B0071 for ; Mon, 30 May 2022 11:06:47 -0400 (EDT) Received: from smtpin15.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay11.hostedemail.com (Postfix) with ESMTP id 3DDFD803D6 for ; Mon, 30 May 2022 15:06:47 +0000 (UTC) X-FDA: 79522736454.15.4625CC3 Received: from mail-yw1-f176.google.com (mail-yw1-f176.google.com [209.85.128.176]) by imf07.hostedemail.com (Postfix) with ESMTP id AE2F240035 for ; Mon, 30 May 2022 15:06:34 +0000 (UTC) Received: by mail-yw1-f176.google.com with SMTP id 00721157ae682-30c143c41e5so55169917b3.3 for ; Mon, 30 May 2022 08:06:46 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bytedance-com.20210112.gappssmtp.com; s=20210112; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=Af0PSK5bhyw9+f+5DkDwRAOmIX0S8zU96NIHBAioFvc=; b=IIUreoS7YFV8tvzCexC8C65TTMCRXB26Hzfj1WudjM4xZIb+eJy1GTgJE7v5pBwaLi BfFwoQfmw0ItOSvZ+sEnt3bkqNXDBUPKLLBxZYnVZ7CVifzBnCPIaIWhGOdfabqXH6w6 clYvnNL18cS0xSDtPHaLcVdPriA/r2wd9ac0t2vHh49MxZH9oyXzW4AAhyUp01E1GQgC xk4YuwgEOBgnf70nSpzqvHu6gYJEaiAdXTCaZJPXM+hB3/Y3r70sL6YmOueUYYT3nasr DxASAvBlFVVTn5rcZ73N1fwxFgdkwVWpRVMEJ0L8Fakf/zrEUGEGZmaeHUFX/49dPEyp yung== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=Af0PSK5bhyw9+f+5DkDwRAOmIX0S8zU96NIHBAioFvc=; b=JfHoMobSO99VfWgWdB9dgGzuHdTYHy/7aQPQfhkp6IMi6u/FIcMUMmlcZVoOS7I080 7dJqqrqb+czd6HBSMTq2BdrJoEAx2lQgEw50sEgfr/rxUn/J7nUvtMTOgepoNhXvC9Cb ej95tW0m+gwFZyF0DTQfmBkuOFiwqIlLFxLEbBl8D+SHYBzaZcItd0P5+D0s62+8Z20A oBcwWz21RF/gupyVo0ZikvMrxpWm1MUUF9xuimnYg2h6atMfLb6RzEzIFFNgt8l3fL/A qJt38lLDUSoq9E2Xbs440iukWbsh94naKul8Gm+thqEgnKjKrt4Gsdn3aHIgkAmxflNo mXgQ== X-Gm-Message-State: AOAM533QjR4DjoInnwBOY1thd4TpaAnAdApHNnT9o47ZxxfUFEb/Z/xY jdqeCEe+Gr/l9nY+rBEWxvcawwoFxAjQHJiGVrShNA== X-Google-Smtp-Source: ABdhPJyJAZSC9ENEzIbG/yOmn6yYK1ICiFZC4ZHfMlFBMNg/VcShoecGpOOZej8r8Sx7xI8MjtkdpYAMhJxG9ks/ORo= X-Received: by 2002:a81:1f84:0:b0:2f8:6138:de59 with SMTP id f126-20020a811f84000000b002f86138de59mr58340971ywf.31.1653923205877; Mon, 30 May 2022 08:06:45 -0700 (PDT) MIME-Version: 1.0 References: <06505918-3b8a-0ad5-5951-89ecb510138e@openvz.org> In-Reply-To: From: Muchun Song Date: Mon, 30 May 2022 23:06:09 +0800 Message-ID: Subject: Re: [PATCH mm v3 9/9] memcg: enable accounting for perpu allocation of struct rt_rq To: Vasily Averin Cc: Andrew Morton , kernel@openvz.org, LKML , Linux Memory Management List , Shakeel Butt , Roman Gushchin , =?UTF-8?Q?Michal_Koutn=C3=BD?= , Vlastimil Babka , Michal Hocko , Cgroups Content-Type: text/plain; charset="UTF-8" X-Rspamd-Server: rspam02 X-Rspamd-Queue-Id: AE2F240035 X-Stat-Signature: 4bej6jgne6poponxtmqpaux6y56ijs94 Authentication-Results: imf07.hostedemail.com; dkim=pass header.d=bytedance-com.20210112.gappssmtp.com header.s=20210112 header.b=IIUreoS7; dmarc=pass (policy=none) header.from=bytedance.com; spf=pass (imf07.hostedemail.com: domain of songmuchun@bytedance.com designates 209.85.128.176 as permitted sender) smtp.mailfrom=songmuchun@bytedance.com X-Rspam-User: X-HE-Tag: 1653923194-445289 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 Mon, May 30, 2022 at 7:27 PM 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 > containers. > > Signed-off-by: Vasily Averin Acked-by: Muchun Song Thanks.