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 X-Spam-Level: X-Spam-Status: No, score=-2.5 required=3.0 tests=MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS,USER_AGENT_SANE_1 autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id D91FFC33C8C for ; Mon, 6 Jan 2020 11:55:18 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 7D58F20731 for ; Mon, 6 Jan 2020 11:55:18 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 7D58F20731 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=kernel.org Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id CB3A58E0005; Mon, 6 Jan 2020 06:55:17 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id C65CE8E0001; Mon, 6 Jan 2020 06:55:17 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id B7C1F8E0005; Mon, 6 Jan 2020 06:55:17 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0129.hostedemail.com [216.40.44.129]) by kanga.kvack.org (Postfix) with ESMTP id 9EEDE8E0001 for ; Mon, 6 Jan 2020 06:55:17 -0500 (EST) Received: from smtpin10.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay02.hostedemail.com (Postfix) with SMTP id 33F2A2DFC for ; Mon, 6 Jan 2020 11:55:17 +0000 (UTC) X-FDA: 76347053874.10.eyes80_684ead02a5200 X-HE-Tag: eyes80_684ead02a5200 X-Filterd-Recvd-Size: 3414 Received: from mail-wm1-f54.google.com (mail-wm1-f54.google.com [209.85.128.54]) by imf16.hostedemail.com (Postfix) with ESMTP for ; Mon, 6 Jan 2020 11:55:16 +0000 (UTC) Received: by mail-wm1-f54.google.com with SMTP id q9so14671490wmj.5 for ; Mon, 06 Jan 2020 03:55:16 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:from:to:cc:subject:message-id:references :mime-version:content-disposition:in-reply-to:user-agent; bh=GfsdYKG1B5YfyLA7EncgtcPx7R6mbN28iX2+mpEAViM=; b=aTmOW9oleZH6AzOHrPy57wccSYnSDGtfi+nfAzxBnh6dRJAEhFgvT4rI2MSW9ObB2I dejP31ZKhSkUC+YpMcEAPLlrZO9n0dKpkN+VlMuNzxa022jG2nFtFI4fvUhhTDOK/GDk vfbG+ZkQq0WdLn5Hhqge2+0UhZxi+nyHXP3S6H6SH7wWmNy1q6R/Vbw7Z1f4cumLTo0y fSMb9YKOIgFebBR/Ls0/X8H51nS1Tiy/Vz73XQMvLCkSIXX+229erMDx8JKnW8by1m3B cPJKm+p4KQJjgOnxPh2zrXZw9l5WZnysTtzothtHrWzbJSC+qj1uKlpv0pJG25LDJXrh vj3w== X-Gm-Message-State: APjAAAUmj6hD3r36wMD0qfPeOVNtixBmXyaMl+0mbPkiB2o877ReNNEt iXm7iMUYEUcf5XEozUkuiVw= X-Google-Smtp-Source: APXvYqwxHzCj74ZfnUMnk1W6z0J80qvpWYWsFB0rX9rW1LacihajjibeIJqXzILqqPnhSJ2mOM6b+Q== X-Received: by 2002:a7b:c30b:: with SMTP id k11mr34374696wmj.36.1578311715649; Mon, 06 Jan 2020 03:55:15 -0800 (PST) Received: from localhost (prg-ext-pat.suse.com. [213.151.95.130]) by smtp.gmail.com with ESMTPSA id p17sm73071586wrx.20.2020.01.06.03.55.14 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 06 Jan 2020 03:55:14 -0800 (PST) Date: Mon, 6 Jan 2020 12:55:14 +0100 From: Michal Hocko To: Matthew Wilcox Cc: lsf-pc@lists.linux-foundation.org, linux-fsdevel@vger.kernel.org, linux-mm@kvack.org, Mel Gorman Subject: Re: [Lsf-pc] [LSF/MM TOPIC] Congestion Message-ID: <20200106115514.GG12699@dhcp22.suse.cz> References: <20191231125908.GD6788@bombadil.infradead.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20191231125908.GD6788@bombadil.infradead.org> User-Agent: Mutt/1.12.2 (2019-09-21) 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 Tue 31-12-19 04:59:08, Matthew Wilcox wrote: > > I don't want to present this topic; I merely noticed the problem. > I nominate Jens Axboe and Michael Hocko as session leaders. See the > thread here: Thanks for bringing this up Matthew! The change in the behavior came as a surprise to me. I can lead the session for the MM side. > https://lore.kernel.org/linux-mm/20190923111900.GH15392@bombadil.infradead.org/ > > Summary: Congestion is broken and has been for years, and everybody's > system is sleeping waiting for congestion that will never clear. > > A good outcome for this meeting would be: > > - MM defines what information they want from the block stack. The history of the congestion waiting is kinda hairy but I will try to summarize expectations we used to have and we can discuss how much of that has been real and what followed up as a cargo cult. Maybe we just find out that we do not need functionality like that anymore. I believe Mel would be a great contributor to the discussion. > - Block stack commits to giving them that information. -- Michal Hocko SUSE Labs