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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 452CEC61DC4 for ; Thu, 27 Aug 2026 19:11:26 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:In-Reply-To:Content-Type: MIME-Version:References:Message-ID:Subject:Cc:To:From:Date:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=91R3l1V/uOl03V126v1cFNRh0hJ1Q8Z9vQ2ulIXNDfU=; b=FL0pbkWkX06Cb6Zankhaq5nHFf 8wU534/J68h1B8ltgyNciY2+QM3jVJgcw3Vi8ZtJFiJBl+FmWJMpMiXOZenQEqHwHq+42mqgZpJLt F9svr+HL9sEHU5AypJkBatnInQP0643HrToBbh1Dmv9SGRZBVxNVS9d5STFSY1weZn0dL8ZQYeIAG 5AiwUsQR/j3MpxBMYJJrk6qsuUUU/pwrgZ1yjg3+CseehYuU4mH/LLuyywOyMdRHwphmVAyWyvK6M h0gXzRWkAtekFJq3uwGgNcs5MIXAhkqhpY1I+lktoe73BjxJhjdZLwy2cn6fnZFPswFTCv7+j68em ETKWLfIA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.99.1 #2 (Red Hat Linux)) id 1wzfVK-00000004gNj-0yKu; Thu, 27 Aug 2026 19:11:14 +0000 Received: from casper.infradead.org ([2001:8b0:10b:1236::1]) by bombadil.infradead.org with esmtps (Exim 4.99.1 #2 (Red Hat Linux)) id 1wzfVH-00000004gNU-3Rx2; Thu, 27 Aug 2026 19:11:13 +0000 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=casper.20170209; 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=91R3l1V/uOl03V126v1cFNRh0hJ1Q8Z9vQ2ulIXNDfU=; b=gyBqQhQWSUlpKmkDdVZfEWq4jC 6Hn05OsO+eGBDUz0AAmCUEB8dWDSJmRIrRRmJjlK6HFS+x9kWb9Lu9gWKzDjol1WfGMTi7t7NMIN0 VWiiU82QKosQg/iEoVdatEQU1vueasyXko0mWYU4KN2egNMRYMsj6pLR75wquzW36Ad9tlRcEAbeZ HfI+ZL/4ygNnv+qG3c7nh5elZzcg+I+63ohE3j5fqgx39c2GRiCbrmcRZrXHx4aBN6AFfeFLxeLpn 9kNSe8uFVHwuGrBkfCU7MPZ6YyE27qsmSJf+8cf+peQXfCmqIg5VU63anBDtlkGHfABhRaSUqgTLe 1bQfMvzw==; Received: from willy by casper.infradead.org with local (Exim 4.99.1 #2 (Red Hat Linux)) id 1wzfVF-0000000DNOM-0LZD; Thu, 27 Aug 2026 19:11:09 +0000 Date: Thu, 27 Aug 2026 20:11:08 +0100 From: Matthew Wilcox To: artem.kuzin@huawei.com Cc: catalin.marinas@arm.com, akpm@linux-foundation.org, david@kernel.org, ljs@kernel.org, vbabka@kernel.org, cl@gentwo.org, linux@armlinux.org.uk, will@kernel.org, mark.rutland@arm.com, liam@infradead.org, rppt@kernel.org, surenb@google.com, mhocko@suse.com, linux-mm@kvack.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, wangkefeng.wang@huawei.com, panov.nikita@huawei.com Subject: Re: [RFC PATCH 00/18] mm: arm64: Add kernel replication feature Message-ID: References: <20260827161158.3618409-1-panov.nikita@huawei.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20260827161158.3618409-1-panov.nikita@huawei.com> X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Fri, Aug 28, 2026 at 12:11:40AM +0800, Nikita Panov wrote: > There were several prior submissions with some sort of replication > for NUMA systems, including one from our side for the x86_64 platform. > In the last couple years, several research articles related to solving > locality issues on NUMA machines through replication emerged as well. You're lumping a lot of different NUMA replication things together in your list. That doesn't give me confidence you know what you're doing. I *think* what you're doing here is kernel text replication. Other architectures (mips, arm) have managed to do this without core MM changes. Why can't you?