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From: Muchun Song In-Reply-To: <20230802012731.62512-1-wangkefeng.wang@huawei.com> Date: Wed, 2 Aug 2023 09:40:55 +0800 Cc: Andrew Morton , Catalin Marinas , Will Deacon , Mike Kravetz , Mina Almasry , kirill@shutemov.name, joel@joelfernandes.org, William Kucharski , kaleshsingh@google.com, Linux-MM , linux-arm-kernel@lists.infradead.org, LKML , 21cnbao@gmail.com Content-Transfer-Encoding: 7bit Message-Id: <5E1DA6D8-4EF8-4273-9C7B-093ADA84AF39@linux.dev> References: <20230801135616.165067-1-wangkefeng.wang@huawei.com> <20230802012731.62512-1-wangkefeng.wang@huawei.com> To: Kefeng Wang X-Migadu-Flow: FLOW_OUT X-Stat-Signature: 63t3uu5z8rdreygt1tm43k3chzdsxkgp X-Rspamd-Server: rspam10 X-Rspamd-Queue-Id: 0D1ED40006 X-Rspam-User: X-HE-Tag: 1690940503-714065 X-HE-Meta: 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 lplmNDUI +gtUsph1135Kre9H/A0+7FlGCF8YTavyRVOblbw3TFVH9X76ntBPzr9K2YiMm+Bfo2NGrCNRB327JT9O9Kh8IlI8kEqOuuw1+6WkvGQ6eM0C0w4aK8xhd8NbBEYlF99V8Bwgcaqs5Ixt+7oe8jxiVRS1HR6DELSzMNj2+ibcghms7+pTy6TFDi2XC/ABf+/K4cF+hX0Izz6Ss/Vs= 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: > On Aug 2, 2023, at 09:27, Kefeng Wang wrote: > > It is better to use huge page size instead of PAGE_SIZE > for stride when flush hugepage, which reduces the loop > in __flush_tlb_range(). > > Let's support arch's flush_hugetlb_tlb_range(), which is > used in hugetlb_unshare_all_pmds(), move_hugetlb_page_tables() > and hugetlb_change_protection() for now. > > Note, for hugepages based on contiguous bit, it has to be > invalidated individually since the contiguous PTE bit is > just a hint, the hardware may or may not take it into account. > > Signed-off-by: Kefeng Wang Reviewed-by: Muchun Song