Documentation: Chinese translation of Documentation/arm64/hugetlbpage.rst
This is a Chinese translated version of Documentation/arm64/hugetlbpage.rst Signed-off-by: Bailu Lin <bailu.lin@vivo.com> Reviewed-by: Alex Shi <alex.shi@linux.alibaba.com> Link: https://lore.kernel.org/r/20201014022003.43862-1-bailu.lin@vivo.com Signed-off-by: Jonathan Corbet <corbet@lwn.net>
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.. _hugetlbpage_index:
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====================
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HugeTLBpage on ARM64
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====================
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.. include:: ../disclaimer-zh_CN.rst
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:Original: :ref:`Documentation/arm64/hugetlbpage.rst <hugetlbpage_index>`
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Translator: Bailu Lin <bailu.lin@vivo.com>
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=====================
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ARM64中的 HugeTLBpage
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=====================
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大页依靠有效利用 TLBs 来提高地址翻译的性能。这取决于以下
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两点 -
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- 大页的大小
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- TLBs 支持的条目大小
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ARM64 接口支持2种大页方式。
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1) pud/pmd 级别的块映射
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-----------------------
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这是常规大页,他们的 pmd 或 pud 页面表条目指向一个内存块。
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不管 TLB 中支持的条目大小如何,块映射可以减少翻译大页地址
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所需遍历的页表深度。
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2) 使用连续位
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-------------
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架构中转换页表条目(D4.5.3, ARM DDI 0487C.a)中提供一个连续
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位告诉 MMU 这个条目是一个连续条目集的一员,它可以被缓存在单
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个 TLB 条目中。
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在 Linux 中连续位用来增加 pmd 和 pte(最后一级)级别映射的大
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小。受支持的连续页表条目数量因页面大小和页表级别而异。
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支持以下大页尺寸配置 -
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====== ======== ==== ======== ===
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- CONT PTE PMD CONT PMD PUD
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====== ======== ==== ======== ===
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4K: 64K 2M 32M 1G
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16K: 2M 32M 1G
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64K: 2M 512M 16G
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====== ======== ==== ======== ===
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:maxdepth: 2
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amu
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hugetlbpage
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