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 EF463C54EE9 for ; Wed, 7 Sep 2022 17:01:40 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 43AA26B0072; Wed, 7 Sep 2022 13:01:40 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 3C2A86B0073; Wed, 7 Sep 2022 13:01:40 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 263E28D0001; Wed, 7 Sep 2022 13:01:40 -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 168416B0072 for ; Wed, 7 Sep 2022 13:01:40 -0400 (EDT) Received: from smtpin02.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay05.hostedemail.com (Postfix) with ESMTP id BBEEA4107E for ; Wed, 7 Sep 2022 17:01:39 +0000 (UTC) X-FDA: 79885905918.02.1F1A52E Received: from mail-pj1-f49.google.com (mail-pj1-f49.google.com [209.85.216.49]) by imf28.hostedemail.com (Postfix) with ESMTP id CE514C00A8 for ; Wed, 7 Sep 2022 17:01:34 +0000 (UTC) Received: by mail-pj1-f49.google.com with SMTP id m10-20020a17090a730a00b001fa986fd8eeso19003731pjk.0 for ; Wed, 07 Sep 2022 10:01:34 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=in-reply-to:content-disposition:mime-version:references:message-id :subject:cc:to:from:date:sender:from:to:cc:subject:date; bh=TqbLb+KgxPbnQGfynSMlarvTL8mplWrZYa3AXE4SSEA=; b=M0aSp3XVpFQ7bWIdvytb5uhz2wbLWyKSJsDmE9iidJ8FRw/dGS/Z3jvvkleFpXTenY QvgPAhYJNZLM593j1hyz554JcYK8lZ17U3nLGgfYdjLbBQ9qrvhmKVafghSFKOweQsDt 49OmiKoUXdb3cmQeHkvJODY4gw4stBvrtAKYgAcbjSZQqbBBEg3vrUP+5nqp+OAAsjUB 1Op9sgJ3u9W1LoKbhiLq2DFuc2BbWHEHEaWGHqZ6uBfV7XfBwtUlKt7iTyXLlYJh6nmM tRBVFjN8unCaFVD691+iDdrGPoPjsqPsGx0qb0NHCgUXsy5Kb3jqfIaZkSNQjtbTpZ2h vPCQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=in-reply-to:content-disposition:mime-version:references:message-id :subject:cc:to:from:date:sender:x-gm-message-state:from:to:cc :subject:date; bh=TqbLb+KgxPbnQGfynSMlarvTL8mplWrZYa3AXE4SSEA=; b=vpFA0JmiSz6NJUuoFvU6qRR0wMNUy/XvnZBrMcFLtKbQV8hpRyjyORfj2V5XijQOX2 UrF17Iz9fiRo34zretMpaJwL9SP8QZKbhZjR8vr0gynyMh20ZnnJAZfs8zsjvXN9sXPC RTUb2nj/4olNEZ3jIQ0YnoMbVqihbxZnOh7oYWIGdp0zjkU+GbCQ/FZVre0oyDTqdPtO eNyCuLRPwQdlNk5DCMZWtzNf03aZP5lkPVwwnXfSG51wlDdQ5mKLgsLiXZdTqptj89kw OpV0XV7ctNO+9VRsabEAY47BrsuoHd6k0C07GvJf9+6iStJtnZuRriQWk6rXA8NTEe6K /8OQ== X-Gm-Message-State: ACgBeo3k5NqxHw5Xg4nyj3pIMxxoh6FEuj2522EW8WbwJuRoUux2xCuV /gZsi4xvHzRh8RMriUYF1zs= X-Google-Smtp-Source: AA6agR5XuW96crLv372qzBHFxbIiWvRWgr6yOvfA1vq/ggrJyf5TJOCYQNT8b+wBNPtAq3IvAjOTpw== X-Received: by 2002:a17:90b:1c8e:b0:1f7:524f:bfcc with SMTP id oo14-20020a17090b1c8e00b001f7524fbfccmr5080854pjb.132.1662570093582; Wed, 07 Sep 2022 10:01:33 -0700 (PDT) Received: from localhost (2603-800c-1a02-1bae-a7fa-157f-969a-4cde.res6.spectrum.com. [2603:800c:1a02:1bae:a7fa:157f:969a:4cde]) by smtp.gmail.com with ESMTPSA id e10-20020a17090301ca00b0016dbdf7b97bsm12654950plh.266.2022.09.07.10.01.32 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 07 Sep 2022 10:01:33 -0700 (PDT) Date: Wed, 7 Sep 2022 07:01:31 -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-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1662570094; 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=TqbLb+KgxPbnQGfynSMlarvTL8mplWrZYa3AXE4SSEA=; b=53gUPUpUw+XQ4jGMNxLU6BGEMLIcR9lzIj6AdPduASSgXJ8whlLMPY7ag/Vz1t3o56MUXT pYxZG0LfvArX7u09Q0GXYn7Bkw8hCxbtShXM4CBGeT6Mv1D6H2hWl+LGrFIU6bkeYlrGad O/WjAoFRCy/MXXD1UGkaExfLFm99lSI= ARC-Authentication-Results: i=1; imf28.hostedemail.com; dkim=pass header.d=gmail.com header.s=20210112 header.b=M0aSp3XV; spf=pass (imf28.hostedemail.com: domain of htejun@gmail.com designates 209.85.216.49 as permitted sender) smtp.mailfrom=htejun@gmail.com; dmarc=fail reason="SPF not aligned (relaxed), DKIM not aligned (relaxed)" header.from=kernel.org (policy=none) ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1662570094; a=rsa-sha256; cv=none; b=GOivHLzM/ZQY9TwPhlqN9ryQV8JLA01T67qciq4wA21QeQh/QYFQMc1EDyL4nrwziG9qqp RVPk8r43NPwstZiBqYBX06GOExFqoF0SUuzKm8EbHpid+m6Y/CfukpZ+tsU8pgvZMsxO+Q d+9R2H8egvDnPa3dvLTBZyfSo+L1l0g= X-Stat-Signature: kpwpa4bdmyihjw6zosenqr4mkf5ck1sy X-Rspamd-Queue-Id: CE514C00A8 X-Rspam-User: Authentication-Results: imf28.hostedemail.com; dkim=pass header.d=gmail.com header.s=20210112 header.b=M0aSp3XV; spf=pass (imf28.hostedemail.com: domain of htejun@gmail.com designates 209.85.216.49 as permitted sender) smtp.mailfrom=htejun@gmail.com; dmarc=fail reason="SPF not aligned (relaxed), DKIM not aligned (relaxed)" header.from=kernel.org (policy=none) X-Rspamd-Server: rspam09 X-HE-Tag: 1662570094-376723 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 Wed, Sep 07, 2022 at 09:27:09AM -0700, Alexei Starovoitov wrote: > On Wed, Sep 7, 2022 at 9:18 AM Tejun Heo wrote: > > > > 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. > > ahh. boot param. > Are you suggesting a global off switch ? Like nosocket and nokmem. > That would be a different story. > Need to think more about it. It could be ok. Yeah, nobpf or sth like that. An equivalent cgroup.memory parameter. Thanks. -- tejun