iomap: Copy larger chunks from userspace

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If we have a large folio, we can copy in larger chunks than PAGE_SIZE.
Start at the maximum page cache size and shrink by half every time we
hit the "we are short on memory" problem.

Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Darrick J. Wong <djwong@kernel.org>

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Matthew Wilcox (Oracle) 2023-05-20 12:13:20 -04:00

parent d6bb59a944

commit 5d8edfb900

1 changed files with 17 additions and 15 deletions

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fs/iomap/buffered-io.c

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