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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-Rspamd-Server: rspam11 X-Rspam-User: X-Stat-Signature: 8xejmbytwp9t5dsne436yuoai3435ucf X-Rspamd-Queue-Id: 605914000A X-HE-Tag: 1787857878-429407 X-HE-Meta: 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 yABay1EY dpRTlW1q9bhZICRlAFQyBA5UsJ6f1oFF3TIzmjqyOrhx0nVSvXxNY3M+NFj1S0msUBjWNFxGwKfIoBY5TX3DEwluYjSybt6je+JV4T2BynZMGWy+2HLjPUx48jVzcSTk5mNojOhRmgYTHcGmINBj70clJAtSajoGB/72ZV0UsMZmKQowhGCoqwBDn8qtCCEqEn3xYGtNYbD+9XGgsHKNM+uIxO0S+JpQ8S7SDlXHyogWVYpmOQO2hrNlOsg== Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: 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?