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| author | Hyeongseok Kim <hyeongseok@gmail.com> | 2021-03-22 06:53:36 +0300 |
|---|---|---|
| committer | Namjae Jeon <namjae.jeon@samsung.com> | 2021-04-27 14:45:07 +0300 |
| commit | c6e2f52e3051e8d898d38840104638ca8bbcdec2 (patch) | |
| tree | 8eb871698cb312d75d7fb56ab582b7ddb133b102 /fs/exfat/exfat_fs.h | |
| parent | 23befe490ba885bdf757d40b2489134315fef690 (diff) | |
| download | linux-c6e2f52e3051e8d898d38840104638ca8bbcdec2.tar.xz | |
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>
Diffstat (limited to 'fs/exfat/exfat_fs.h')
| -rw-r--r-- | fs/exfat/exfat_fs.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/fs/exfat/exfat_fs.h b/fs/exfat/exfat_fs.h index e77fe2f45cf2..1d6da61157c9 100644 --- a/fs/exfat/exfat_fs.h +++ b/fs/exfat/exfat_fs.h @@ -457,7 +457,7 @@ void exfat_update_dir_chksum_with_entry_set(struct exfat_entry_set_cache *es); int exfat_calc_num_entries(struct exfat_uni_name *p_uniname); int exfat_find_dir_entry(struct super_block *sb, struct exfat_inode_info *ei, struct exfat_chain *p_dir, struct exfat_uni_name *p_uniname, - int num_entries, unsigned int type); + int num_entries, unsigned int type, struct exfat_hint *hint_opt); int exfat_alloc_new_dir(struct inode *inode, struct exfat_chain *clu); int exfat_find_location(struct super_block *sb, struct exfat_chain *p_dir, int entry, sector_t *sector, int *offset); |