linux

iv/linux

History

Hyeongseok Kim c6e2f52e30 exfat: speed up iterate/lookup by fixing start point of traversing cluster chain

When directory iterate and lookup is called, there's a buggy rewinding
of start point for traversing cluster chain to the parent directory
entry's first cluster. This caused repeated cluster chain traversing
from the first entry of the parent directory that would show worse
performance if huge amounts of files exist under the parent directory.
Fix not to rewind, make continue from currently referenced cluster and
dir entry.

Tested with 50,000 files under single directory / 256GB sdcard,
with command "time ls -l > /dev/null",
Before :     0m08.69s real     0m00.27s user     0m05.91s system
After  :     0m07.01s real     0m00.25s user     0m04.34s system

Signed-off-by: Hyeongseok Kim <hyeongseok@gmail.com>
Reviewed-by: Sungjong Seo <sj1557.seo@samsung.com>
Signed-off-by: Namjae Jeon <namjae.jeon@samsung.com>

2021-04-27 20:45:07 +09:00

balloc.c

exfat: improve write performance when dirsync enabled

2021-04-27 20:45:06 +09:00

cache.c

exfat: fix use of uninitialized spinlock on error path

2020-10-07 14:27:13 +09:00

dir.c

exfat: speed up iterate/lookup by fixing start point of traversing cluster chain

2021-04-27 20:45:07 +09:00

exfat_fs.h

exfat: speed up iterate/lookup by fixing start point of traversing cluster chain