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Fri, 27 Feb 2026 14:30:40 -0500 (EST) From: "Kiryl Shutsemau (Meta)" 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: [PATCHv7 06/18] LoongArch/mm: Align vmemmap to maximal folio size Date: Fri, 27 Feb 2026 19:30:07 +0000 Message-ID: <20260227193030.272078-6-kas@kernel.org> X-Mailer: git-send-email 2.51.2 In-Reply-To: <20260202155634.650837-1-kas@kernel.org> References: <20260202155634.650837-1-kas@kernel.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Rspam-User: X-Rspamd-Queue-Id: 4686C1A0002 X-Rspamd-Server: rspam08 X-Stat-Signature: yd8kntdc7uxg3he8ft8h7ca3n1xsitzb X-HE-Tag: 1772220643-735089 X-HE-Meta: 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 20v7zFUq 90yVDMvqPk7gxZ1632je1M4TuucTmGgFSy6Q13mQR384BJ7URdnLbdFaws82frQ2AuBO94iIrfeGE3RCZuVLOZTfJ6qgWngIurFhVnQLT5DDntSNVPU2dV8gc+nsrqNASPmnhBaLdyPcEf/ONBCXVweRhxt4h22Og8aNPlTMZcaIQ4h01MRySPc/FujbRs/FJITdeIQY4z0FePoAJ6/qtxdRCdgt68VDcbDqBYKlbRJbzWw6YFHSWogVb04odgHuHmqUR Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: From: Kiryl Shutsemau 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_VMEMMAP_ALIGN. 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..ea6c09eed2e7 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_VMEMMAP_ALIGN) +#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