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85ffbf5557
Replace six implicit calls to compound_head() with one. Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org> Reviewed-by: Zhihao Cheng <chengzhihao1@huawei.com> Signed-off-by: Richard Weinberger <richard@nod.at>
16 lines
371 B
ReStructuredText
16 lines
371 B
ReStructuredText
.. SPDX-License-Identifier: GPL-2.0
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==========
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Page Cache
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==========
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The page cache is the primary way that the user and the rest of the kernel
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interact with filesystems. It can be bypassed (e.g. with O_DIRECT),
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but normal reads, writes and mmaps go through the page cache.
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Folios
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======
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The folio is the unit of memory management within the page cache.
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Operations
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