f2fs: support large folio for immutable non-compressed case

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This patch enables large folio for limited case where we can get the high-order
memory allocation. It supports the encrypted and fsverity files, which are
essential for Android environment.

How to test:
- dd if=/dev/zero of=/mnt/test/test bs=1G count=4
- f2fs_io setflags immutable /mnt/test/test
- echo 3 > /proc/sys/vm/drop_caches
 : to reload inode with large folio
- f2fs_io read 32 0 1024 mmap 0 0 /mnt/test/test

Reviewed-by: Chao Yu <chao@kernel.org>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>

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This commit is contained in:

Jaegeuk Kim 2025-11-12 21:52:01 +00:00

parent 8f0b4cce44

commit 05e65c14ea

5 changed files with 306 additions and 10 deletions

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43

Documentation/filesystems/f2fs.rst

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247

fs/f2fs/data.c

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16

fs/f2fs/f2fs.h

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4

fs/f2fs/file.c

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6

fs/f2fs/inode.c

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