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b=BzW0ige8moHKxCsRbPugd62Yndyj4ujFsahw2nRcpTm9uavw9pSg+Cl3QXZMbhbOs CRJ/obpvlt+QtfpvDJqG8erfrQUDxd/jWu23tqqnM6x+1x30CnyupCQeq5j9qD0kxm JCSvjzPRI2QgUgvpr9pYX6THqbL5wDqC0F8YDbumK+wvx3tKpJxUN8VB+WXAk1WGa5 RJuGyF0FkI25BxDdvd7tqG7jgI2YTJ7vwg7NSKi9reKMPaQ8jeRM/iCXcV5rbidTje H40htvvu58zYGzXh1d37lXzt0+aPfGvRwj8LGEX24mIvIpT14Bwm7cRX5l5Wy4tBOb SutlY4vi8RBXQ== From: "Barry Song (Xiaomi)" To: linux-mm@kvack.org, linux-arm-kernel@lists.infradead.org, catalin.marinas@arm.com, will@kernel.org, akpm@linux-foundation.org, urezki@gmail.com Cc: linux-kernel@vger.kernel.org, anshuman.khandual@arm.com, ryan.roberts@arm.com, ajd@linux.ibm.com, rppt@kernel.org, david@kernel.org, Xueyuan.chen21@gmail.com, "Barry Song (Xiaomi)" Subject: [RFC PATCH 1/8] arm64/hugetlb: Extend batching of multiple CONT_PTE in a single PTE setup Date: Wed, 8 Apr 2026 10:51:08 +0800 Message-Id: <20260408025115.27368-2-baohua@kernel.org> X-Mailer: git-send-email 2.39.3 (Apple Git-146) In-Reply-To: <20260408025115.27368-1-baohua@kernel.org> References: <20260408025115.27368-1-baohua@kernel.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Rspam-User: X-Rspamd-Queue-Id: 3CA6B40009 X-Stat-Signature: p31k79tmc4dtz5esmoe3zyuts1baqzbf X-Rspamd-Server: rspam06 X-HE-Tag: 1775616697-895861 X-HE-Meta: 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 ckDYWvkS 25jdlBD4r2CmI7aScxwb2LvF4ZaYsVU0VAkwrzZaQKvH+efHSJVGwGgxZE6DZ2ZJGY6Gj+qaOIGAc449R+e/ESrlYPXvP0eW4i6nnut5FvtZ0J52vcotPx1wePDae+FPPHHmUbUT/ko7zXbSUJXIZx0MQIBCCr/dHSQDLHcy0uTeUFmwopTPmdygIikDn/IUA3Zg5U5afotNlQfyEkMfNiOouL5w7CiiPySAZlaiL50EKaUWaPGAaiiCrGE8mFsaWuTRqum2cJuGdlYNm4KTDoTKi0t+8jVECiOaGIW76TQIv2Y5MUdtw3KApvkGgQPFQz2Zfg0Xo6ZoGddwtBD1Lo+ySD3ytgPtXILFX Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: For sizes aligned to CONT_PTE_SIZE and smaller than PMD_SIZE, we can batch CONT_PTE settings instead of handling them individually. Signed-off-by: Barry Song (Xiaomi) --- arch/arm64/mm/hugetlbpage.c | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/arch/arm64/mm/hugetlbpage.c b/arch/arm64/mm/hugetlbpage.c index a42c05cf5640..bf31c11ebd3b 100644 --- a/arch/arm64/mm/hugetlbpage.c +++ b/arch/arm64/mm/hugetlbpage.c @@ -110,6 +110,12 @@ static inline int num_contig_ptes(unsigned long size, size_t *pgsize) contig_ptes = CONT_PTES; break; default: + if (size < CONT_PMD_SIZE && size > 0 && + IS_ALIGNED(size, CONT_PTE_SIZE)) { + contig_ptes = size >> PAGE_SHIFT; + *pgsize = PAGE_SIZE; + break; + } WARN_ON(!__hugetlb_valid_size(size)); } @@ -359,6 +365,10 @@ pte_t arch_make_huge_pte(pte_t entry, unsigned int shift, vm_flags_t flags) case CONT_PTE_SIZE: return pte_mkcont(entry); default: + if (pagesize < CONT_PMD_SIZE && pagesize > 0 && + IS_ALIGNED(pagesize, CONT_PTE_SIZE)) + return pte_mkcont(entry); + break; } pr_warn("%s: unrecognized huge page size 0x%lx\n", -- 2.39.3 (Apple Git-146)