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[2603:800c:1a02:1bae:a7fa:157f:969a:4cde]) by smtp.gmail.com with ESMTPSA id s9-20020a170902b18900b00174f62a14e5sm12572006plr.153.2022.09.07.09.18.10 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 07 Sep 2022 09:18:10 -0700 (PDT) Date: Wed, 7 Sep 2022 06:18:09 -1000 From: Tejun Heo To: Alexei Starovoitov Cc: Yafang Shao , Alexei Starovoitov , Daniel Borkmann , Andrii Nakryiko , Martin KaFai Lau , Song Liu , Yonghong Song , John Fastabend , KP Singh , Stanislav Fomichev , Hao Luo , Jiri Olsa , Johannes Weiner , Michal Hocko , Roman Gushchin , Shakeel Butt , Muchun Song , Andrew Morton , Zefan Li , "open list:CONTROL GROUP (CGROUP)" , Network Development , bpf , linux-mm Subject: Re: [PATCH bpf-next v3 00/13] bpf: Introduce selectable memcg for bpf map Message-ID: References: <20220902023003.47124-1-laoar.shao@gmail.com> 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=1662567492; a=rsa-sha256; cv=none; b=SzRMHdSMD5vCPZiK+w70WUNac+6T17znCXXMM8crhmjO9DC3RN+/YG3WgyeX3q+4z+t68k sXWkZ7UzQlT6OWO084Bj8LgN3SoLTRQSsWZBDkdhV03sLO0zdRczq2lnci42PyzbN3otMr 6H8m1SbDGXhNBSquIWC4+xqAEheJ4bg= ARC-Authentication-Results: i=1; imf25.hostedemail.com; dkim=pass header.d=gmail.com header.s=20210112 header.b=fLpa63La; dmarc=fail reason="SPF not aligned (relaxed), DKIM not aligned (relaxed)" header.from=kernel.org (policy=none); spf=pass (imf25.hostedemail.com: domain of htejun@gmail.com designates 209.85.210.180 as permitted sender) smtp.mailfrom=htejun@gmail.com ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1662567491; h=from:from:sender: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=uhG7u+w7VyCcpyqgRvdj5juA1UtJgIUngIaiJnQjnlg=; b=DC0IfFMUV1kYmowewwo8QVIwv+fkg4IEADMDmm+b11m2xtNbsyHPC4DfI3N0aDTtFS5F0b fUS3ZUvpyjdJgFvvwV0thlLvCrw4IyhbjZYthh1nQrknw91Y6QjxH+i8clL9PFqG8WoHHt eI4ymCcUZ0kDPaTfKvDUgpvqge17yV0= X-Rspamd-Server: rspam07 X-Rspamd-Queue-Id: E7495A0095 Authentication-Results: imf25.hostedemail.com; dkim=pass header.d=gmail.com header.s=20210112 header.b=fLpa63La; dmarc=fail reason="SPF not aligned (relaxed), DKIM not aligned (relaxed)" header.from=kernel.org (policy=none); spf=pass (imf25.hostedemail.com: domain of htejun@gmail.com designates 209.85.210.180 as permitted sender) smtp.mailfrom=htejun@gmail.com X-Stat-Signature: ggcxs95a8ytxhcqfehn1gmi6fbd4s7ma X-Rspam-User: X-HE-Tag: 1662567491-8542 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: Hello, On Wed, Sep 07, 2022 at 09:13:09AM -0700, Alexei Starovoitov wrote: > Hmm. We discussed this option already. We definitely don't want > to introduce an uapi knob that will allow anyone to skip memcg > accounting today and in the future. cgroup.memory boot parameter is how memcg provides last-resort workarounds for this sort of problems / regressions while they're being addressed. It's not a dynamically changeable or programmable thing. Just a boot time opt-out. That said, if you don't want it, you don't want it. Thanks. -- tejun