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[198.145.29.99]) by mx.google.com with ESMTPS id y2si22919548plp.79.2019.05.21.19.23.52 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Tue, 21 May 2019 19:23:52 -0700 (PDT) Received-SPF: pass (google.com: domain of akpm@linux-foundation.org designates 198.145.29.99 as permitted sender) client-ip=198.145.29.99; Authentication-Results: mx.google.com; dkim=pass header.i=@kernel.org header.s=default header.b=rrMba+ZX; spf=pass (google.com: domain of akpm@linux-foundation.org designates 198.145.29.99 as permitted sender) smtp.mailfrom=akpm@linux-foundation.org Received: from akpm3.svl.corp.google.com (unknown [104.133.8.65]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id B50F72173C; Wed, 22 May 2019 02:23:51 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1558491832; bh=wUT9Oh+IJNtkbs2q1QgrEx8t9Q4hOJE0j84LxGl06Ug=; h=Date:From:To:Cc:Subject:In-Reply-To:References:From; b=rrMba+ZX8lAWROnAkoY5D87S9fOHTRdkoZESFNef+egifs+9lW5INd3V34LCpOvOW ep7TPyh1yBfU7lTlu2c/pnv0E+itIOFlpZ0CBGnpLSdfWnHistSsaGwGjpZ44icvk7 UFRqgijB26uTYluj1BTcuo9Hh9ACLE+qIkeUJN3I= Date: Tue, 21 May 2019 19:23:51 -0700 From: Andrew Morton To: Johannes Weiner Cc: Michal Hocko , mm-commits@vger.kernel.org, tj@kernel.org, guro@fb.com, dennis@kernel.org, chris@chrisdown.name, cgroups mailinglist , linux-mm@kvack.org Subject: Re: + mm-consider-subtrees-in-memoryevents.patch added to -mm tree Message-Id: <20190521192351.4d3fd16c6f0e6a0b088779a6@linux-foundation.org> In-Reply-To: <20190518013348.GA6655@cmpxchg.org> References: <20190212224542.ZW63a%akpm@linux-foundation.org> <20190213124729.GI4525@dhcp22.suse.cz> <20190516175655.GA25818@cmpxchg.org> <20190516180932.GA13208@dhcp22.suse.cz> <20190516193943.GA26439@cmpxchg.org> <20190517123310.GI6836@dhcp22.suse.cz> <20190518013348.GA6655@cmpxchg.org> X-Mailer: Sylpheed 3.7.0 (GTK+ 2.24.31; x86_64-pc-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit 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 Fri, 17 May 2019 21:33:48 -0400 Johannes Weiner wrote: > - Adoption data suggests that cgroup2 isn't really used yet. RHEL8 was > just released with cgroup1 per default. Fedora is currently debating > a switch. None of the other distros default to cgroup2. There is an > article on the lwn frontpage *right now* about Docker planning on > switching to cgroup2 in the near future. Kubernetes is on > cgroup1. Android is on cgroup1. Shakeel agrees that Facebook is > probably the only serious user of cgroup2 right now. The cloud and > all mainstream container software is still on cgroup1. I'm thinking we need a cc:stable so these forthcoming distros are more likely to pick up the new behaviour? Generally, your arguments sound good to me - I don't see evidence that anyone is using cgroup2 in a manner which is serious enough to be seriously affected by this change.