From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from casper.infradead.org (casper.infradead.org [90.155.50.34]) (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 808B240B6F4 for ; Thu, 27 Aug 2026 19:11:18 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=90.155.50.34 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1787857883; cv=none; b=oGk1Sn7/TcjW2dyQ9di4sKHwK6ubAac7PiMKg+1cZOc0BdP5OYI1ofIP9q2W5Ug2G8KUplGAPP7Y5MM0b+DRS6BVHjmBo4eI9D18cbgIXhSVl9Lqq8/WB3dPVG7NCsUl8FkJrMcsoLC/J59rEch1enbfqOcda7m0ABiI/jDoW3M= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1787857883; c=relaxed/simple; bh=FrkLLh51z7/E9eOLs6G8CsVUkCbPu+E8RDHpKYVjKic=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=WGDa05Ev+xgUJLzHwrsQu0mHhxi+dcCZClPi02QuOZ+Ty2+haXqCwnlPUZKGl/Ujf1HvSwJI0wHbJLqSnyjq2HKbwJYQY039Kc5okshrpBt/Y3i7heFOnwTwOLN9MNfmyY9dJFxmGo3tsw7xCTW1QCNd/mnvXh4V+KzHspE+CKQ= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=infradead.org; spf=pass smtp.mailfrom=infradead.org; dkim=pass (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b=gyBqQhQW; arc=none smtp.client-ip=90.155.50.34 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=infradead.org Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=infradead.org Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b="gyBqQhQW" 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> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20260827161158.3618409-1-panov.nikita@huawei.com> 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?