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b=JShWTYBwz3T1m0D+gMlzyAXZUOV5lZTEdKWEmPLNzsIRW+v6wGYjzrWz/3a+qlIIh uHEBwZWTzfI+8nM1pcwM53SGkhGVtDsLBHshuYSxtzNG61JCXbS2MprM5hV/RW220H EL1fsA/x1UUGroAbYZBw+qSGfyZB4AOspBYFjnzgVnaVolzaeMfQXuiyzSNiu/Vp5y FZk8uOr8DWU5XDcsKIwXsglFSq2MXx57+zvKA08GWuWTcIghT/EEC8a7yprTEzE1K1 C3sWmvVFn06QL/mupd6DGhe9ParugCE3t4qUWqqEJB1lwXJ/5dePwtcAucWejA+WvE v93jIoibDc7rw== Date: Thu, 12 Nov 2026 13:54:08 +0200 From: Mike Rapoport To: Arnd Bergmann Cc: linux-mm@kvack.org, Arnd Bergmann , Andrew Morton , Andreas Larsson , "Christophe Leroy (CS GROUP)" , Dave Hansen , "David Hildenbrand (Arm)" , Jason Gunthorpe , Linus Walleij , "Lorenzo Stoakes (ARM)" , Matthew Wilcox , Malin Jonsson , Richard Weinberger , Russell King , linux-arm-kernel@lists.infradead.org, linux-fsdevel@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, x86@kernel.org Subject: Re: [PATCH v2 4/6] mm: drop HIGHPTE support altogether Message-ID: References: <20261112112528.1116405-1-arnd@kernel.org> <20261112112528.1116405-5-arnd@kernel.org> X-Archived-By: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20261112112528.1116405-5-arnd@kernel.org> X-Stat-Signature: z8nr6gpemw3pt76fkupppcf4pd88j9id X-Rspamd-Server: rspam01 X-Rspam-User: X-Spam-Status: No, score=-15.8 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_PASS, SPF_PASS autolearn=ham autolearn_force=no version=4.0.1 X-Rspamd-Queue-Id: 52BFC14000B X-HE-Tag: 1794484458-462759 X-HE-Meta: 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 v9LEaC+c 6VhHj407orB7+030M/C/RefmJintvo/KMnVYFp1UJdqcE4aGrzrckz2xvtijfNy5+h8q4kBkUXTvo1eTnsAIytIbzMK8UbdvhZ1bBWjwXsFAHYAhvLgh0TSxtf/BkOXgZw/ba8nerLLxN4gm3hNTH0wenI2A9DUkyPdOnHesRkDuIeDyvOd9ntgUchpCt8KLROAQBpqKB/Eja2QOlEQeHzAc12Yx3Gtkb8Dvq1/BaAFdLucgd4LEyYVZB6nNRX398DAbPIHE3ELyVwvUiGnNnhD35yQ== Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: X-Spam-Checker-Version: SpamAssassin 4.0.1 (2024-03-26) on aws-us-west-2-korg-listserv-alma10-1 On Thu, Nov 12, 2026 at 12:25:26PM +0100, Arnd Bergmann wrote: > From: Arnd Bergmann > > With both x86 and arm having dropped CONFIG_HIGHPTE support, no > architecture is left using it, so remove the remnants in common code. > > It is likely that further cleanups are possible in the page table > code but those are not obvious from the config options. > > Signed-off-by: Arnd Bergmann > --- > include/linux/hugetlb.h | 5 +---- > include/linux/mm.h | 1 - > include/linux/pgtable.h | 9 --------- > 3 files changed, 1 insertion(+), 14 deletions(-) With this and arm HIGHPTE patches applied there are still a few leftovers: $ git grep HIGHPTE arch/arm/configs/vt8500_v6_v7_defconfig:CONFIG_HIGHPTE=y mm/memory.c: * Dumping the PTE would be nice, but it's tricky with CONFIG_HIGHPTE, mm/pgtable-generic.c: * kmapped if necessary (when CONFIG_HIGHPTE), and locked against concurrent mm/userfaultfd.c: * index ordering when CONFIG_HIGHPTE is enabled. We mapped dst_pte Acked-by: Mike Rapoport (Microsoft) -- Sincerely yours, Mike.