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 mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 83444C433F5 for ; Mon, 18 Oct 2021 23:16:28 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 60F6C61074 for ; Mon, 18 Oct 2021 23:16:27 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org 60F6C61074 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=shutemov.name Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=kvack.org Received: by kanga.kvack.org (Postfix) id DAD46900003; Mon, 18 Oct 2021 19:16:26 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id D5C12900002; Mon, 18 Oct 2021 19:16:26 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id C2475900003; Mon, 18 Oct 2021 19:16:26 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0040.hostedemail.com [216.40.44.40]) by kanga.kvack.org (Postfix) with ESMTP id B49CF900002 for ; Mon, 18 Oct 2021 19:16:26 -0400 (EDT) Received: from smtpin13.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay02.hostedemail.com (Postfix) with ESMTP id 74D9832637 for ; Mon, 18 Oct 2021 23:16:26 +0000 (UTC) X-FDA: 78711119172.13.D3E3854 Received: from mail-lf1-f48.google.com (mail-lf1-f48.google.com [209.85.167.48]) by imf14.hostedemail.com (Postfix) with ESMTP id 335036001990 for ; Mon, 18 Oct 2021 23:16:27 +0000 (UTC) Received: by mail-lf1-f48.google.com with SMTP id i24so3100775lfj.13 for ; Mon, 18 Oct 2021 16:16:25 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=shutemov-name.20210112.gappssmtp.com; s=20210112; h=date:from:to:cc:subject:message-id:references:mime-version :content-disposition:in-reply-to; bh=g8NcdhqdVTYivLPB/4AQ/n+hK6qI5Cqzz6EhWUcLIk4=; b=aAgTInrSiwhLMEvXKlaIEPoHz91AKhYnFSh6ZeY+8aJ0m70YuCN1AEZZBWoZtmDnc0 UH93kBEjtd+TYhT62QAI7CBjo2v93qAopTUcR6TmRLkNao76XsyoKi86VcVcxx/zguwH YPSt1VisZ9TPpfyBoJ0BFEUQoZwBYLZlh8ek71OfJvcTUwYscpaWaHuOczDDY8vjvrVI oPALskxKO+CCRY875mfkvHPAEGgkTPYrcshxB4Wqp6jjgSQe1FMFORpDo0LPNMrsgJ+0 g71o7VwLfcRnj3CRv/EWq/3SGww9AETo058msEGtDQx5bjW6V8HaEvMKTQED22hcxCCs NBDA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:date:from:to:cc:subject:message-id:references :mime-version:content-disposition:in-reply-to; bh=g8NcdhqdVTYivLPB/4AQ/n+hK6qI5Cqzz6EhWUcLIk4=; b=LdR+K8grRgZQBIzeD4XT3qyYM6hqaMlT2Jn314zgq/+mekENnCZUyqDlOhWHnWd8JQ w8XHFC6Ueo7B9zaOy11Ck7NnL73xJBkqOY+MWpOgurUzfiLN/rW6hBJCEOjJqaWKBScx RR25g1W3pJFyPj/7GtbbDZfpe19UND9CkeeoQ+23sceRFByf8LWjm0YQeDMncMIr+0+x N6C9eoR9GZg5C/lmIv2Ytw/bDFzPSI/AT8LDGHPb4HmYMChlV7qhDdfs18HHSWeIQK0I 7TIW4tysE037LbBcXLG+JWCYPLAYqGpbNYWi5f9/SfognP/piCgFrGOE45Pk7DQPhLWZ EKEg== X-Gm-Message-State: AOAM531pdwPtE8wm+oSbulJ8nG6R18wQNUlXIlF/mDIokWclBA3pH1xM kX4p/puEwqlvOhE6MjqFenXFTA== X-Google-Smtp-Source: ABdhPJzYZsc9DzluDfFcQYm/U5oV2+pFcKeBboxjUKEhxR81JlpIWnF73PROY1HoFW3gBKesKVPj9w== X-Received: by 2002:a19:48d1:: with SMTP id v200mr2600433lfa.47.1634598984410; Mon, 18 Oct 2021 16:16:24 -0700 (PDT) Received: from box.localdomain ([86.57.175.117]) by smtp.gmail.com with ESMTPSA id o21sm1765814ljg.93.2021.10.18.16.16.23 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 18 Oct 2021 16:16:23 -0700 (PDT) Received: by box.localdomain (Postfix, from userid 1000) id A5E6610309A; Tue, 19 Oct 2021 02:16:27 +0300 (+03) Date: Tue, 19 Oct 2021 02:16:27 +0300 From: "Kirill A. Shutemov" To: Johannes Weiner Cc: Matthew Wilcox , Kent Overstreet , Linus Torvalds , linux-mm@kvack.org, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, Andrew Morton , "Darrick J. Wong" , Christoph Hellwig , David Howells , Hugh Dickins Subject: Re: Folios for 5.15 request - Was: re: Folio discussion recap - Message-ID: <20211018231627.kqrnalsi74bgpoxu@box.shutemov.name> References: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: X-Rspamd-Server: rspam06 X-Rspamd-Queue-Id: 335036001990 X-Stat-Signature: ttazkpot6b9hkf1ghgb3gi9h3k9kfq93 Authentication-Results: imf14.hostedemail.com; dkim=pass header.d=shutemov-name.20210112.gappssmtp.com header.s=20210112 header.b=aAgTInrS; spf=none (imf14.hostedemail.com: domain of kirill@shutemov.name has no SPF policy when checking 209.85.167.48) smtp.mailfrom=kirill@shutemov.name; dmarc=none X-HE-Tag: 1634598987-735933 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, Oct 18, 2021 at 05:56:34PM -0400, Johannes Weiner wrote: > > I don't think there will ever be consensus as long as you don't take > > the concerns of other MM developers seriously. On Friday's call, several > > people working on using large pages for anon memory told you that using > > folios for anon memory would make their lives easier, and you didn't care. > > Nope, one person claimed that it would help, and I asked how. Not > because I'm against typesafety, but because I wanted to know if there > is an aspect in there that would specifically benefit from a shared > folio type. I don't remember there being one, and I'm not against type > safety for anon pages. > > What several people *did* say at this meeting was whether you could > drop the anon stuff for now until we have consensus. My read on the meeting was that most of people had nothing against anon stuff, but asked if Willy could drop anon parts to get past your objections to move forward. You was the only person who was vocal against including anon pars. (Hugh nodded to some of your points, but I don't really know his position on folios in general and anon stuff in particular). For record: I think folios has to be applied, including anon bits. They are useful and address long standing issues with compound pages. Any future type-safety work can be done on top of it. I know it's not democracy and we don't count votes here, but we are dragging it for months and don't get closer to consensus. At some point "disagree and commit" has to be considered. -- Kirill A. Shutemov