nilfs2: convert persistent object allocator to use kmap_local

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Regarding the allocator code that is commonly used in the ondisk inode
metadata file ifile and the disk address translation metadata file DAT,
convert the parts that use the deprecated kmap_atomic() and kmap() to use
kmap_local.

Most can be converted directly, but only
nilfs_palloc_prepare_alloc_entry() needs to be rewritten to change mapping
sections so that multiple kmap_local/kunmap_local calls are nested and
disk I/O can be avoided within the mapping sections.

Link: https://lkml.kernel.org/r/20240122140202.6950-7-konishi.ryusuke@gmail.com
Signed-off-by: Ryusuke Konishi <konishi.ryusuke@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

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Ryusuke Konishi 2024-01-22 23:01:53 +09:00 • committed by Andrew Morton

parent 6b473de888

commit af6eae6468

1 changed files with 46 additions and 45 deletions

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fs/nilfs2/alloc.c

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