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t=1788797766; bh=g5gCMZVvjY3jhzdUCpCDafX4/mtwLtsEY0ulBAQJCZU=; h=Date:Subject:To:Cc:References:From:In-Reply-To; b=HgkI3ujS3x61Lys7IBDcKfnZgKKBvTApLki3mnSwXUmxqfz6CqjPvU1NQA6j82btv jMRP4VMJsfJwymk9nw3sWRpYbGIaHBOfkKvzZJIc7sOziuCS7LcFHK8+rZqb23OWO3 WAyGllgUmjqFdSeWhdczaxfLv9CG0THqg8tDFq02+x3Lw4+99hqsAgzHK88YG5e5zx ZKGegeB1Jnyoix9YBlP04m9MjBd7Bk7Ky9A8o0MfbeaISnujnO3NpQ4uHQyoUPgTpX LoNfZt5Dx0XstG+CTE7ANmCMDtDJ1JMu48yAG3FWCI2m87j3FZO455jgs80AaoPdJk 6D+HSQhT0EltQ== Message-ID: <47652536-6f87-4ade-9866-67a20da8772d@kernel.org> Date: Mon, 7 Sep 2026 18:15:58 +0200 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [RFC PATCH 00/18] mm: arm64: Add kernel replication feature To: Nikita Panov , cl@gentwo.org Cc: akpm@linux-foundation.org, artem.kuzin@huawei.com, catalin.marinas@arm.com, liam@infradead.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, linux@armlinux.org.uk, ljs@kernel.org, mark.rutland@arm.com, mhocko@suse.com, rppt@kernel.org, surenb@google.com, vbabka@kernel.org, wangkefeng.wang@huawei.com, will@kernel.org, yang.shi@os.amperecomputing.com References: <20260829111953.893466-1-panov.nikita@huawei.com> From: "David Hildenbrand (Arm)" Content-Language: en-US Autocrypt: addr=david@kernel.org; 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charset=UTF-8 Content-Transfer-Encoding: 7bit X-Rspamd-Server: rspam03 X-Rspamd-Queue-Id: 21BC540004 X-Stat-Signature: gqyqj7kekej3cg7dsx4h1dw1g4ijoba7 X-Rspam-User: X-HE-Tag: 1788797766-191417 X-HE-Meta: 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 7h7jjnr8 3HfC1N9uLIo7KuL6Z/h6fC+h10mNzbZJ8qWNbO7MFlcv7K08d5E8vlS5FzO8FeTds6zeS3l/R2GtaIxm+w6MuE2yr6z3GKhcv6yR0yicZZyw8bJpQs9SbRzDevx+avYgCxk/8QLGK/S4GMTlXwbY1RYnkZkpGzgNnwvK/G4dp81AMoHv1Rb9VH4jHj3Sp8Y7r3ZovjYMC37B1v7O3HqlsExpkyr98Wj5RsJRyo1Dk3VOe862+XY6BFFaYz0qf5cp8Jj78pmgUTf1JhHNnEYA1sjELZkvnYx53pl0F Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: > > For me, it looks like the kernel text and rodata replication could be > adapted on top of the "Optimize this_cpu_*" patch set. > Problems with pgd synchronizations are the same and should be fixed as well. > Since vmalloc code is used for percpu memory allocations, module replication > might be supported, the only thing that should be taken into account - > data locality. > Consider all of this, we can focus on preparing the new patch series, on top of > the Yang Shi's patches and share it. If that path is ok, we will start. I would wait for feedback from arm64 maintainers before moving forward with this plan. -- Cheers, David