From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id E856B401A11; Wed, 8 Jul 2026 08:19:07 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1783498750; cv=none; b=T85oHmefRsE74MB2sDK8om+n6ge13n8FkjhgJUdtYw07ROLpXAULvtJGXXNgGkUWXkkdh3Nbqb75XoNxAb4TjzXyU5O/xv5YC8XDEEhJgV2LxWFrCY7Rs+CO6PBFkZYb78IP1uxI4CiNk83orbOA4phNIFaVjOdqs5vj2m0JGes= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1783498750; c=relaxed/simple; bh=MxnodoHmXQ7GMcFO0k2oYN7qufEkUyNllOvO9DhGSi4=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=Tyg4kNsPIMjHv5gIk6J0Ui28OfHc6f1yX69O14sbbnYX/eDyBd6uywlEk7OSno8z6LoL5zSWcLFCv+OMysI7od9lYH+llw4an7fEReMJcXHPA7kd68hoZGC3ATx4kGq7PkwBBd29z/4Cioipu6Wuge6SeKteV2psq9MajClkl74= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=QdvyZCiv; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="QdvyZCiv" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 7E0161F00A3A; Wed, 8 Jul 2026 08:18:49 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1783498744; bh=1ibv7LCs2MM3+w/kFVTxR/YXvtZXmrajdpEtg3xzhNI=; h=Date:Subject:To:Cc:References:From:In-Reply-To; b=QdvyZCivxwxR0DFbpJ1rgXihEOh17TKP220D8PE5i50uviCdTcweWA9BRXhJZrrtE jxez042LVDm0uhhANf/fDYgSKifyLhsfhUCTpFGKhZ1jb8G2bbfIGWXsJ2a46rXDNT SiFDqt216OJiwUS6Nr0NsKBZXCuWq23BUSehnAsoq28Fwff3N6j9/eGHvcDVXLnTCc inH+VvhGivBL7wQiWxbDH7AgMaX2WsZH0c4Ap31INrrz8vu6opOLC35dX7o7MLOtvt HwvgAJoclfP0kbGSytvjaUoB2Gb6sMJKxoPljtj/tGOku2i7/xdo7sWVXLIekkjg1B MXvzn4BWOSP4w== Message-ID: <5c73f9de-01c9-4798-9c08-960ad6435476@kernel.org> Date: Wed, 8 Jul 2026 10:18:47 +0200 Precedence: bulk X-Mailing-List: linux-fsdevel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [RFC PATCH v2 00/13] mm: rework anon_vma and remove anon_vma_chain To: wangtao , "akpm@linux-foundation.org" , "will@kernel.org" , "mingo@redhat.com" , "sj@kernel.org" , "kees@kernel.org" , "luizcap@redhat.com" , "zhangjiao2@cmss.chinamobile.com" , "kas@kernel.org" , "ljs@kernel.org" Cc: "hpa@zytor.com" , "liam@infradead.org" , "vbabka@kernel.org" , "rppt@kernel.org" , "surenb@google.com" , "mhocko@suse.com" , "jack@suse.cz" , "riel@surriel.com" , "harry@kernel.org" , "jannh@google.com" , "jgg@ziepe.ca" , "jhubbard@nvidia.com" , "peterx@redhat.com" , "ziy@nvidia.com" , "baolin.wang@linux.alibaba.com" , "npache@redhat.com" , "ryan.roberts@arm.com" , "dev.jain@arm.com" , "baohua@kernel.org" , "lance.yang@linux.dev" , "xu.xin16@zte.com.cn" , "chengming.zhou@linux.dev" , "muchun.song@linux.dev" , "baoquan.he@linux.dev" , "nao.horiguchi@gmail.com" , "matthew.brost@intel.com" , "joshua.hahnjy@gmail.com" , "rakie.kim@sk.com" , "byungchul@sk.com" , "gourry@gourry.net" , "ying.huang@linux.alibaba.com" , "apopple@nvidia.com" , "pfalcato@suse.de" , "linux-arm-kernel@lists.infradead.org" , "linux-kernel@vger.kernel.org" , "linux-fsdevel@vger.kernel.org" , "linux-mm@kvack.org" , "damon@lists.linux.dev" , "shakeel.butt@linux.dev" , "ryncsn@gmail.com" , "jparsana@google.com" , "dvander@google.com" , zhangji , wangzicheng References: <20260707063308.29176-1-tao.wangtao@honor.com> <08c001ab-320f-4676-830b-8e4ba6a05dee@kernel.org> <0e8e5a28-1111-4b81-b04f-b81e749eb3dd@kernel.org> <66e8d008-5eaf-4a9a-9cca-e9b2bd8c9f9a@kernel.org> <104a258dcf2f4e4387199b62a66141a6@honor.com> From: "David Hildenbrand (Arm)" Content-Language: en-US Autocrypt: addr=david@kernel.org; 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charset=UTF-8 Content-Transfer-Encoding: 8bit On 7/8/26 05:26, wangtao wrote: >>> At first, I thought I was the only one who found anon_vma hard to >>> understand. After reading your earlier email, I realized that many people >> also consider it difficult to follow. >> >> Right, that's how Lorenzo started his work, trying to replace/remove >> anon_vma entirely. >> >> So I tried a different approach and implemented >>> anon_vma rmap using a simpler doubly linked list plus depth mechanism. >> >> And this is what I don't understand. You were told that Lorenzo is working on >> removing anon_vma, yet you decided to work on + send something that >> reworks anon_vma? >> >> Also, I am really curious about your expectation: not having a single patch >> contributed to MM, even worse, not a single RB tag or anything, yet you >> rework one of the most complicated part of MM repeatedly using other >> complicated approaches, and immediately start demand technical discussions? >> After sending an absolute horrible v1? >> >> I really try to be a nice person, but really, am I dreaming? >> > > It’s simple: optimize memory usage and share it with the community. Yes, and you can work on whatever you want, and share it with people as much as you like. But RFC literally means "Requests For Comments", not "hey, I hacked something together, maybe this could be useful at some point". -- Cheers, David