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 C6F73C0218F for ; Tue, 4 Feb 2025 05:46:35 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 3EC9F6B007B; Tue, 4 Feb 2025 00:46:35 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id 39CDE6B0083; Tue, 4 Feb 2025 00:46:35 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 2BCC66B0085; Tue, 4 Feb 2025 00:46:35 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0012.hostedemail.com [216.40.44.12]) by kanga.kvack.org (Postfix) with ESMTP id 0CE626B007B for ; Tue, 4 Feb 2025 00:46:35 -0500 (EST) Received: from smtpin08.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay07.hostedemail.com (Postfix) with ESMTP id 7B20716075B for ; Tue, 4 Feb 2025 05:46:34 +0000 (UTC) X-FDA: 83081177508.08.3D1F0EF Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) by imf08.hostedemail.com (Postfix) with ESMTP id DB727160009 for ; Tue, 4 Feb 2025 05:46:32 +0000 (UTC) Authentication-Results: imf08.hostedemail.com; dkim=pass header.d=infradead.org header.s=bombadil.20210309 header.b=XyWyjhY6; spf=none (imf08.hostedemail.com: domain of BATV+ea2238c820210655d397+7835+infradead.org+hch@bombadil.srs.infradead.org has no SPF policy when checking 198.137.202.133) smtp.mailfrom=BATV+ea2238c820210655d397+7835+infradead.org+hch@bombadil.srs.infradead.org; dmarc=none ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1738647992; h=from:from: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=Rty0JZF5oeFjJSGzFr15PJZmkjhcG+bI1soh2SfcfKQ=; b=1jgodQVF2QzUl9GXeUjs9JxOlmsv+86PykPrUV8CIikJPw8D9t4xudojqT0r+evr7Lwaih XVhjuhwRuY+04boPQhzBhN4ibZee2R/J5ccRNi2VI2nGFonhtn/HgEtMuLuG5iI/VMAPNZ aEv+jKcfS4lJMWBZQnogx/gCXS7vw8A= ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1738647992; a=rsa-sha256; cv=none; b=A/zH7ybKjX5r/Pv0uv3tkZIu8JlKKduJKu7vhRnrEjMwABIZZubDEQpGnO9Y7HdT2B1fPX /iHUpUWgJgpASJu0WyzrpmB6Cso/2tyY+KlEpqZx2zyk0O8k3W0LBtBuQrP0lkN3sbH8oD exnKOdreS8TcYLWEr7APtSR7dDrJkl8= ARC-Authentication-Results: i=1; imf08.hostedemail.com; dkim=pass header.d=infradead.org header.s=bombadil.20210309 header.b=XyWyjhY6; spf=none (imf08.hostedemail.com: domain of BATV+ea2238c820210655d397+7835+infradead.org+hch@bombadil.srs.infradead.org has no SPF policy when checking 198.137.202.133) smtp.mailfrom=BATV+ea2238c820210655d397+7835+infradead.org+hch@bombadil.srs.infradead.org; dmarc=none DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=bombadil.20210309; h=In-Reply-To:Content-Type:MIME-Version :References:Message-ID:Subject:Cc:To:From:Date:Sender:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description; bh=Rty0JZF5oeFjJSGzFr15PJZmkjhcG+bI1soh2SfcfKQ=; b=XyWyjhY6ubKyWUur457n7iK+le 4Iy1A+zYa3IEjDIK7OUYxnB4Zocd8R5DuwY9LpKmd6pPjF+K0VovIZv44nSgzL8tKzPAREKhX45rM hLUvpQqjVQqWKpNh4soN8mCkCBhfebQ+m9QFL1MWAqGHugpjIqFrloftZ3UiZneVRHzIMdnVxldV9 8IQDKF5DfO8vP/TVEJqnO88f/d0nD9ef/nmHQpCQnNcPD/0ky78N51mRx65vk6TzXnywLzBYBpAB7 UWlsDJSMUkUxKyynLVYgvks3+a3bIyTnc6U4nnnsyiBL/nQyA7iwxosyB3rsdjj/DF8NwUheW0tnE Nk0OshFw==; Received: from hch by bombadil.infradead.org with local (Exim 4.98 #2 (Red Hat Linux)) id 1tfBlN-0000000HIhR-2Dom; Tue, 04 Feb 2025 05:46:21 +0000 Date: Mon, 3 Feb 2025 21:46:21 -0800 From: Christoph Hellwig To: Suren Baghdasaryan Cc: lsf-pc@lists.linux-foundation.org, SeongJae Park , Minchan Kim , m.szyprowski@samsung.com, aneesh.kumar@kernel.org, Joonsoo Kim , mina86@mina86.com, Matthew Wilcox , Vlastimil Babka , Lorenzo Stoakes , "Liam R. Howlett" , David Hildenbrand , Michal Hocko , linux-mm , android-kernel-team Subject: Re: [LSF/MM/BPF TOPIC] Guaranteed CMA Message-ID: References: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org. See http://www.infradead.org/rpr.html X-Stat-Signature: 4k87jpz71yuinh98gofegug81o1yspmk X-Rspam-User: X-Rspamd-Queue-Id: DB727160009 X-Rspamd-Server: rspam03 X-HE-Tag: 1738647992-802111 X-HE-Meta: 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 o+JgxPI7 LXMaPsQz1ChoUBBAtOxl58YElbvGwu9P5uLcQRomL2/9OILNPMZXfVB7g8wTRClwcGHNB6wuYZqAtE0RulPxdHqsTIdLqQUV62eJEY7MdfQ7CbWNfYndSovbhT/NvGY6uwfYHMW17rqd09/V2duud/z9mXzcExNshoXajokFsEIRT9wxKZhhpOnBfd3iuaU3iDizh8jdofYTs4IQNkqhiFP3sjUiSMFSiXbOQfjbH1KB9AfMubEpQgj67F6ZoqYpLzHxwZ+udpfPRoKZPMmBMKl5gDmuZicWtL+1gAxOSEuF6RoCpf85L0fTa+X3qqkbvazA8LJGpUhg2Gi2Y7/bl5acMOj/0qIlkeO8FkBSznVCPOMn7RmykBQPPPCz5pZErT6Eb9GN1AT4pfdPMXXnLj5zd1EA7ZaO3anMVnF6/xGVxrXzd9KmUMV9JKUX2GQHxlyEGSvFLZ4d7MdW2/ouoEZ8BAcDes/8tWZYb8h/fYyNEhBM= X-Bogosity: Ham, tests=bogofilter, spamicity=0.021186, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On Sat, Feb 01, 2025 at 04:19:25PM -0800, Suren Baghdasaryan wrote: > Hi, > I would like to discuss the Guaranteed Contiguous Memory Allocator > (GCMA) mechanism that is being used by many Android vendors as an > out-of-tree feature, collect input on its possible usefulness for > others, feasibility to upstream and suggestions for possible better > alternatives. Well, start by having code on the list. We really need to stop all these super hypothetical "wouldn't it be nice" discussions clogging up the conferences.