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Wed, 28 Jan 2026 08:55:53 -0500 (EST) From: Kiryl Shutsemau To: Andrew Morton , Muchun Song , David Hildenbrand , Matthew Wilcox , Usama Arif , Frank van der Linden Cc: Oscar Salvador , Mike Rapoport , Vlastimil Babka , Lorenzo Stoakes , Zi Yan , Baoquan He , Michal Hocko , Johannes Weiner , Jonathan Corbet , Huacai Chen , WANG Xuerui , Palmer Dabbelt , Paul Walmsley , Albert Ou , Alexandre Ghiti , kernel-team@meta.com, linux-mm@kvack.org, linux-kernel@vger.kernel.org, linux-doc@vger.kernel.org, loongarch@lists.linux.dev, linux-riscv@lists.infradead.org, Kiryl Shutsemau Subject: [PATCHv5 06/17] LoongArch/mm: Align vmemmap to maximal folio size Date: Wed, 28 Jan 2026 13:54:47 +0000 Message-ID: <20260128135500.22121-7-kas@kernel.org> X-Mailer: git-send-email 2.51.2 In-Reply-To: <20260128135500.22121-1-kas@kernel.org> References: <20260128135500.22121-1-kas@kernel.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Rspamd-Server: rspam11 X-Stat-Signature: kcrprg4pqp6btxo4z7c9k4pb6sfmurhe X-Rspam-User: X-Rspamd-Queue-Id: D93C020007 X-HE-Tag: 1769608557-452544 X-HE-Meta: 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 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: The upcoming change to the HugeTLB vmemmap optimization (HVO) requires struct pages of the head page to be naturally aligned with regard to the folio size. Align vmemmap to MAX_FOLIO_NR_PAGES. Signed-off-by: Kiryl Shutsemau --- arch/loongarch/include/asm/pgtable.h | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/arch/loongarch/include/asm/pgtable.h b/arch/loongarch/include/asm/pgtable.h index c33b3bcb733e..f9416acb9156 100644 --- a/arch/loongarch/include/asm/pgtable.h +++ b/arch/loongarch/include/asm/pgtable.h @@ -113,7 +113,8 @@ extern unsigned long empty_zero_page[PAGE_SIZE / sizeof(unsigned long)]; min(PTRS_PER_PGD * PTRS_PER_PUD * PTRS_PER_PMD * PTRS_PER_PTE * PAGE_SIZE, (1UL << cpu_vabits) / 2) - PMD_SIZE - VMEMMAP_SIZE - KFENCE_AREA_SIZE) #endif -#define vmemmap ((struct page *)((VMALLOC_END + PMD_SIZE) & PMD_MASK)) +#define VMEMMAP_ALIGN max(PMD_SIZE, MAX_FOLIO_NR_PAGES * sizeof(struct page)) +#define vmemmap ((struct page *)(ALIGN(VMALLOC_END, VMEMMAP_ALIGN))) #define VMEMMAP_END ((unsigned long)vmemmap + VMEMMAP_SIZE - 1) #define KFENCE_AREA_START (VMEMMAP_END + 1) -- 2.51.2