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| author | Hyeongseok Kim <hyeongseok@gmail.com> | 2021-02-01 10:02:46 +0900 |
|---|---|---|
| committer | Namjae Jeon <namjae.jeon@samsung.com> | 2021-02-22 09:55:14 +0900 |
| commit | f728760aa923f1dd3a4818368dbdbd2c7d63b370 (patch) | |
| tree | 724e1eaf79e92ec72f0f5d47b315448c47d88504 /fs/exfat/exfat_fs.h | |
| parent | 78c276f5495aa53a8beebb627e5bf6a54f0af34f (diff) | |
exfat: improve performance of exfat_free_cluster when using dirsync mount option
There are stressful update of cluster allocation bitmap when using
dirsync mount option which is doing sync buffer on every cluster bit
clearing. This could result in performance degradation when deleting
big size file.
Fix to update only when the bitmap buffer index is changed would make
less disk access, improving performance especially for truncate operation.
Testing with Samsung 256GB sdcard, mounted with dirsync option
(mount -t exfat /dev/block/mmcblk0p1 /temp/mount -o dirsync)
Remove 4GB file, blktrace result.
[Before] : 39 secs.
Total (blktrace):
Reads Queued: 0, 0KiB Writes Queued: 32775, 16387KiB
Read Dispatches: 0, 0KiB Write Dispatches: 32775, 16387KiB
Reads Requeued: 0 Writes Requeued: 0
Reads Completed: 0, 0KiB Writes Completed: 32775, 16387KiB
Read Merges: 0, 0KiB Write Merges: 0, 0KiB
IO unplugs: 2 Timer unplugs: 0
[After] : 1 sec.
Total (blktrace):
Reads Queued: 0, 0KiB Writes Queued: 13, 6KiB
Read Dispatches: 0, 0KiB Write Dispatches: 13, 6KiB
Reads Requeued: 0 Writes Requeued: 0
Reads Completed: 0, 0KiB Writes Completed: 13, 6KiB
Read Merges: 0, 0KiB Write Merges: 0, 0KiB
IO unplugs: 1 Timer unplugs: 0
Signed-off-by: Hyeongseok Kim <hyeongseok@gmail.com>
Acked-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 b8f0e829ecbd..764bc645241e 100644 --- a/fs/exfat/exfat_fs.h +++ b/fs/exfat/exfat_fs.h @@ -408,7 +408,7 @@ int exfat_count_num_clusters(struct super_block *sb, int exfat_load_bitmap(struct super_block *sb); void exfat_free_bitmap(struct exfat_sb_info *sbi); int exfat_set_bitmap(struct inode *inode, unsigned int clu); -void exfat_clear_bitmap(struct inode *inode, unsigned int clu); +void exfat_clear_bitmap(struct inode *inode, unsigned int clu, bool sync); unsigned int exfat_find_free_bitmap(struct super_block *sb, unsigned int clu); int exfat_count_used_clusters(struct super_block *sb, unsigned int *ret_count); |