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Fri, 1 May 2026 14:12:08 -0400 (EDT) Date: Fri, 1 May 2026 19:12:03 +0100 From: Kiryl Shutsemau To: "David Hildenbrand (Arm)" Cc: lsf-pc@lists.linux-foundation.org, linux-mm@kvack.org, x86@kernel.org, linux-kernel@vger.kernel.org, Andrew Morton , Thomas Gleixner , Ingo Molnar , Borislav Petkov , Dave Hansen , Lorenzo Stoakes , "Liam R. Howlett" , Mike Rapoport , Matthew Wilcox , Johannes Weiner , Usama Arif Subject: Re: [LSF/MM/BPF TOPIC] 64k (or 16k) base page size on x86 Message-ID: References: <01ea8acf-69ee-404e-8785-59fb0a527253@kernel.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <01ea8acf-69ee-404e-8785-59fb0a527253@kernel.org> X-Rspamd-Server: rspam11 X-Rspamd-Queue-Id: 36986140002 X-Stat-Signature: dizw5ujzre6ccmt53uf13gd1armx6ugx X-Rspam-User: X-HE-Tag: 1777659133-442880 X-HE-Meta: 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 4BQX5/1c m9w3R9TYUZ3apEreMupjzGb5kaJi3YqI1dJpSEJQwHriC7p2OiSUQqgJC0C9/IFrqfT1tIsW/pnjusSsWgIJMaZp3CDHPVD40Ct4f8JxyvyAw6zuno1GkUWljoOh45cUgY2OEC7enN1S6YFkxXvCHSgHmV5g8bwmQno/FA4iLmQkhUFE5HjhnOMQekC7W2avtDI76kvbZT1NqwcnuEsugNyfudotOO5C6nMA/73mW1PKDtym+EhXF1B7PDRw69EBO0gnllmCqAL31fZpeIKm3JaAERoE65TThf39WLOlCGNJnm5k= Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On Fri, May 01, 2026 at 08:02:28PM +0200, David Hildenbrand (Arm) wrote: > On 5/1/26 20:00, Kiryl Shutsemau wrote: > > On Thu, Feb 19, 2026 at 03:08:58PM +0000, Kiryl Shutsemau wrote: > >> == Status == > >> > >> I have a POC implementation on top of v6.17: > >> > >> git://git.kernel.org/pub/scm/linux/kernel/git/kas/linux.git pte_size > > > > Just a heads up. > > > > I've updated the tree. It is on top of v7.0 now. > > > > I can boot my VM fully (not only to shell as before) on all three page > > size 4k, 16k and 64k. And it doesn't crash immediately. > > > > Page fault handler is the most challenging part of the design. I wanted > > to flash it out to RFC quality before the summit, but it is not there > > yet. But it started getting a shape. > > > > Volume of the code changes makes it hard to deal with the patchset: > > > > 1530 files changed, 12675 insertions(+), 8669 deletions(-) > > I think you know the answer already :P :/ Let me present the case at least. Most of this is cocci change and most of + difference is tests. -- Kiryl Shutsemau / Kirill A. Shutemov