exfat: optimize allocation bitmap loading time

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Loading the allocation bitmap is very slow if user set the small cluster
size on large partition.

For optimizing it, This patch uses sb_breadahead() read the allocation
bitmap. It will improve the mount time.

The following is the result of about 4TB partition(2KB cluster size)
on my target.

without patch:
real 0m41.746s
user 0m0.011s
sys 0m0.000s

with patch:
real 0m2.525s
user 0m0.008s
sys 0m0.008s

Reviewed-by: Sungjong Seo <sj1557.seo@samsung.com>
Reviewed-by: Yuezhang Mo <Yuezhang.Mo@sony.com>
Signed-off-by: Namjae Jeon <linkinjeon@kernel.org>

...

This commit is contained in:

Namjae Jeon 2025-09-06 08:13:04 +09:00

parent cb8d6d4aa0

commit 9fd688678d

1 changed files with 13 additions and 0 deletions

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fs/exfat/balloc.c

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