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[34.76.113.97]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-47aa0960af0sm22530706f8f.30.2026.07.06.05.47.04 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 06 Jul 2026 05:47:05 -0700 (PDT) Date: Mon, 6 Jul 2026 12:47:02 +0000 From: Adrian =?utf-8?Q?Barna=C5=9B?= To: Mike Rapoport Cc: Brendan Jackman , linux-arm-kernel@lists.infradead.org, linux-mm@kvack.org, Catalin Marinas , Will Deacon , Ryan Roberts , David Hildenbrand , Ard Biesheuvel , Christoph Lameter , Yang Shi , Brendan Jackman , owner-linux-mm@kvack.org Subject: Re: [RFC PATCH 3/6] arm64: mm: fix restoring linear map permissions on execmem cache clean Message-ID: References: <20260611130144.1385343-1-abarnas@google.com> <20260611130144.1385343-4-abarnas@google.com> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8; format=flowed Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: X-Stat-Signature: agxcjpxcmobp7xkfks5qter9wpnxyid4 X-Rspamd-Queue-Id: 8837B20009 X-Rspamd-Server: rspam01 X-Rspam-User: X-HE-Tag: 1783342027-207282 X-HE-Meta: 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 ht0ASrJB Rrory5anHhcwBU4bhawKSaxjHAsWfdv6/l+gHcc83mlh0nvcXDd4vroIVNo1iloI7DtAEzE7bftKKu4wSYbKs/90Upzrq4QijfuzWh3K/BQVWhCOz0lFUKYh5WvXR1qnXoAht/2SVZj2XN+PJTScUSZsp3MYoInZFKSmsxT4JfcvUvgOlkSGPKti90oXDVaQaHLTz/liGbLm2oyjm0WztYJJ+aXqyI8H2LDj+RT9JT59RiRe0T6YzIjeOelZiMA1f8wWxJKbjlQkAv6tlGG8F9p3ezTpNfQ2YXScb9oxI9ghaFTD2OCI8edaTvW5Qe+HULfj4PAYS6uYhG7gbciNNSmXcIWMQ2gv4lt+tKQp6Wz9T8yjgd5VfkqFk8jsGWPz6Xd/yDHpuPYlXH99QseUCKIGMEeRkD9s7CtKXdkiEhiOxRXxqnjG8RV62HA== Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On Mon, Jul 06, 2026 at 02:35:14PM +0300, Mike Rapoport wrote: >Hi Adrian, > >On Wed, Jun 17, 2026 at 03:18:27PM +0000, Adrian Barnaś wrote: >> >> Following your suggestion, I can put together a preparatory patch series to >> refactor the set_direct_map_* APIs to accept a nr_pages parameter. This >> refactoring would also allow us to drop the redundant set_area_direct_map >> helper. I could then rebase the rox_cache series on top of that. > >I've been looking at something related and I was already half way through >adding numpages to set_direct_map when I remembered this conversation :) > >Here's what I have for now: > >https://git.kernel.org/pub/scm/linux/kernel/git/rppt/linux.git/log/?h=direct-map/v0 > I did roughly the same on my local tree. >This is only lightly build tested for arm64 and x86. > >As this is WIP, things may change there, but I hope it can save you some >time with your arm64 ROX cache work. I will fetch your commits and I will keep an eye on your tree if anything changes. Thanks, Adrian