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 E3875C433F5 for ; Wed, 23 Mar 2022 13:30:42 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 39F586B0072; Wed, 23 Mar 2022 09:30:42 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 34EBB6B0073; Wed, 23 Mar 2022 09:30:42 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 23DE36B0074; Wed, 23 Mar 2022 09:30:42 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0093.hostedemail.com [216.40.44.93]) by kanga.kvack.org (Postfix) with ESMTP id 157F26B0072 for ; Wed, 23 Mar 2022 09:30:42 -0400 (EDT) Received: from smtpin29.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay02.hostedemail.com (Postfix) with ESMTP id B93D4A32C1 for ; Wed, 23 Mar 2022 13:30:41 +0000 (UTC) X-FDA: 79275735882.29.D21CEE2 Received: from mail-lf1-f45.google.com (mail-lf1-f45.google.com [209.85.167.45]) by imf18.hostedemail.com (Postfix) with ESMTP id 329541C0035 for ; Wed, 23 Mar 2022 13:30:41 +0000 (UTC) Received: by mail-lf1-f45.google.com with SMTP id 5so2750400lfp.1 for ; Wed, 23 Mar 2022 06:30:40 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20210112; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=2lL2JE5GgwXJiLPtd/18uFa+12RIFEUKyuC62+S6vQM=; b=XS/3r3+6bNzCD9Fvait1efCNepjFgQNmTCrbRr4cGps2Sz4fbeeQ2wT+85ZgdamPFW ZY1X+JUzHsm+7B15obesZeqIydW9gxvR+d9bBSkL6Ryq36ZM1Pyo+wrkwwxSbRTpxOI3 TDlP4A0ZpXyt+mr+GcTgiqjBJspTZzDARqlAsxtFwfNIRubIJG/qsX4D+G/yG+VFCBdF F/rbzxbdErXvz4kMrNbmyhz+PnXQ5baQfRCdE2D9uxkAHbAx0iM/D/oXewI5pqus74/Z akCBvHoJnoh6Jyq7Y9op3FRaoz5+LmXNd/diMyOVQHCN14RMGTZ1dIwAlYA0c96rOqrm qx3A== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=2lL2JE5GgwXJiLPtd/18uFa+12RIFEUKyuC62+S6vQM=; b=zNZfU+or/F3iMtY8i16vHdL09xHDTON2REnrbn6BgDncClMDmI0eIqoCa5BYRHsJjJ wArNNQcqpqt9icsiZzs/cbxFdUL1zTH9cZ/Cs26tsdLxepoO3KJqbBrx48VB1gB3mjOx E8QruA92Xeyynk0C69q5zab5XGb3Wk9zgeMFji1R2kiq2E8giU9e9q74u7yRyeHsTP3K DKbFHRi2ot4wB2LEUgtU7sY7wXgCylF3WyOVZkvc0hjqRwS6rC7CW/jud2pt8u+UsIBl yfMm4oRN6tD6BhXDpyWQQRtPaPzV6fEpiRzxjPF1iY75Ml3aJQOUyMZuDT6sYshXmIry 0/dA== X-Gm-Message-State: AOAM531Mix2miNOq/v2DCxxicG9LuCJ6EupuETBYwbDSuftT+wVc76dG Bn1s3d15x7g7TnKk/N+hR4QzfU+Fsidf6J5l3Ov9Hg== X-Google-Smtp-Source: ABdhPJy/dQNNeaFkFaUa/8qieTLqrwcFMGnZEhclGX+NIO8N6rUm0xBIIaCEK/KSMsAPmRIGgbn++k1haoLrj56mqWg= X-Received: by 2002:a05:6512:2822:b0:44a:12a5:5258 with SMTP id cf34-20020a056512282200b0044a12a55258mr16688278lfb.354.1648042239369; Wed, 23 Mar 2022 06:30:39 -0700 (PDT) MIME-Version: 1.0 References: <20220308213417.1407042-1-zokeefe@google.com> In-Reply-To: From: "Zach O'Keefe" Date: Wed, 23 Mar 2022 06:30:02 -0700 Message-ID: Subject: Re: [RFC PATCH 00/14] mm: userspace hugepage collapse To: Michal Hocko Cc: Alex Shi , David Hildenbrand , David Rientjes , Pasha Tatashin , SeongJae Park , Song Liu , Vlastimil Babka , Zi Yan , linux-mm@kvack.org, Yang Shi , Matthew Wilcox , Andrea Arcangeli , Andrew Morton , Arnd Bergmann , Axel Rasmussen , Chris Kennelly , Chris Zankel , Helge Deller , Hugh Dickins , Ivan Kokshaysky , "James E.J. Bottomley" , Jens Axboe , "Kirill A. Shutemov" , Matt Turner , Max Filippov , Miaohe Lin , Minchan Kim , Patrick Xia , Pavel Begunkov , Peter Xu , Thomas Bogendoerfer Content-Type: text/plain; charset="UTF-8" X-Stat-Signature: z9n6p8g8tg3q8sqhjnnbks9uyn7g7d6p Authentication-Results: imf18.hostedemail.com; dkim=pass header.d=google.com header.s=20210112 header.b="XS/3r3+6"; spf=pass (imf18.hostedemail.com: domain of zokeefe@google.com designates 209.85.167.45 as permitted sender) smtp.mailfrom=zokeefe@google.com; dmarc=pass (policy=reject) header.from=google.com X-Rspam-User: X-Rspamd-Server: rspam08 X-Rspamd-Queue-Id: 329541C0035 X-HE-Tag: 1648042241-455742 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, Mar 22, 2022 at 5:06 AM Michal Hocko wrote: > > On Mon 21-03-22 23:40:39, Zach O'Keefe wrote: > [...] > > In preparation of a V1 PATCH series which will incorporate the > > feedback received here, one item I'd specifically like feedback from > > the community on is whether support for privately-mapped anonymous > > memory is sufficient to motivate an initial landing of MADV_COLLAPSE, > > with file-backed support coming later. > > Yes I think this should be sufficient for the initial implementation. > > > I have local patches to support > > file-backed memory, but my thought was to keep the series no longer > > than necessary, for the consideration of reviewers. > > Agreed! I think we should focus on the semantic of the anonymous memory > first. Great! Sounds good to me and thanks again for the review & feedback. > -- > Michal Hocko > SUSE Labs