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[104.155.118.152]) by smtp.gmail.com with ESMTPSA id a640c23a62f3a-c1c32a78229sm131383566b.1.2026.07.22.08.17.21 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 22 Jul 2026 08:17:22 -0700 (PDT) Date: Wed, 22 Jul 2026 15:17:19 +0000 From: Adrian =?utf-8?Q?Barna=C5=9B?= To: "Mike Rapoport (Microsoft)" Cc: linux-mm@kvack.org, Albert Ou , Andrew Morton , Andy Lutomirski , Borislav Petkov , Brendan Jackman , Catalin Marinas , Dave Hansen , David Hildenbrand , Huacai Chen , Ingo Molnar , Ingo Molnar , Kevin Brodsky , "Liam R. Howlett" , Lorenzo Stoakes , Michal Hocko , Palmer Dabbelt , Paul Walmsley , Peter Zijlstra , "H. Peter Anvin" , Suren Baghdasaryan , Thomas Gleixner , Vlastimil Babka , Will Deacon , linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-riscv@lists.infradead.org, loongarch@lists.linux.dev, x86@kernel.org, Dave Hansen , Juergen Gross Subject: Re: [PATCH RFC 00/18] arch, mm: create a generic set_memory/change_page_attr core Message-ID: References: <20260721-generic-set-memory-v0-1-v1-0-2c1fc62306b3@kernel.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii; format=flowed Content-Disposition: inline In-Reply-To: <20260721-generic-set-memory-v0-1-v1-0-2c1fc62306b3@kernel.org> X-Rspam-User: X-Rspamd-Queue-Id: 7CE5720012 X-Rspamd-Server: rspam01 X-Stat-Signature: i4g8nktt77ff3jzui9om1p39axhpwua9 X-HE-Tag: 1784733445-511499 X-HE-Meta: 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 ZHbp85+i 7V3i7pE88lBVGmSxpAD0ksCrUsoiftF4IOVblmfxEdaTxH0LjID433X82gxlHJrhsUUASj7gsybcWB8UW4AvMTuW/LQXxoOR/saBF1bDg+M6M6AGF/brcDTX/DRqx/lNMNnwnO66gUkH+XBP9inCempV9ydI9i9kTgm21syM/pYfN+8tn68abeCekBLrnYnKxzvt+9gIR8huJtlD+jTXwNegT+cjWfU5FyqOuCiOzuK4lopAP81unaCYPXEcjssz/aC4mhdK42xIbn0R/yJXi92Of32z6kQDgX/leDf05t50A9icfkW5nlOiA/B6hy4DLaRnZ2kxZG3HzfKOVQsLugwykO4RkIwPcVYFIK0cDA8iHhAj3qxcsMgUktJtNULj9BcTMh3hU/UML03tkygbC5QUyX23rg0gjRGTfsNWuQ6Dpdt9/FCo5GRYmDA== Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On Tue, Jul 21, 2026 at 07:23:23PM +0300, Mike Rapoport (Microsoft) wrote: Hi Mike, >Once this settles, the next step I'm planning is to convert arm64. This >would be much more involved than loongarch and riscv together, so I >didn't even aspire to include arm64 in the first RFC. That said, I have >a very ugly arm64 prototype that rewrites arch/arm64/pageattr.c to use >the generic CPA infrastructure and replaces the existing implementation >of page table splits for systems that support bbml2. But there's a lot >of yak shaving there to get from a PoC to actual patches. Could you share your PoC for ARM64. I can help you with that and align my execmem rox cache for ARM64 changes to the desired shape of this API. Best regards, Adrian