diff options
| author | Jaegeuk Kim <jaegeuk.kim@samsung.com> | 2013-11-18 17:16:17 +0900 |
|---|---|---|
| committer | Jaegeuk Kim <jaegeuk.kim@samsung.com> | 2013-12-23 10:18:01 +0900 |
| commit | 971767caf632190f77a40b4011c19948232eed75 (patch) | |
| tree | 2a3eb454e7924271978932a81b825b1b0136db98 /fs/f2fs/super.c | |
| parent | 7d5e510944ce60ef0c6c2300a58547679df76db7 (diff) | |
f2fs: use sbi->write_mutex for write bios
This patch removes an unnecessary semaphore (i.e., sbi->bio_sem).
There is no reason to use the semaphore when f2fs submits read and write IOs.
Instead, let's use a write mutex and cover the sbi->bio[] by the lock.
Change log from v1:
o split write_mutex suggested by Chao Yu
Chao described,
"All DATA/NODE/META bio buffers in superblock is protected by
'sbi->write_mutex', but each bio buffer area is independent, So we
should split write_mutex to three for DATA/NODE/META."
Signed-off-by: Chao Yu <chao2.yu@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
Diffstat (limited to 'fs/f2fs/super.c')
| -rw-r--r-- | fs/f2fs/super.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/fs/f2fs/super.c b/fs/f2fs/super.c index a022412c66ea..e194578b3594 100644 --- a/fs/f2fs/super.c +++ b/fs/f2fs/super.c @@ -820,6 +820,7 @@ static int f2fs_fill_super(struct super_block *sb, void *data, int silent) struct buffer_head *raw_super_buf; struct inode *root; long err = -EINVAL; + int i; /* allocate memory for f2fs-specific super block info */ sbi = kzalloc(sizeof(struct f2fs_sb_info), GFP_KERNEL); @@ -876,7 +877,10 @@ static int f2fs_fill_super(struct super_block *sb, void *data, int silent) mutex_init(&sbi->node_write); sbi->por_doing = false; spin_lock_init(&sbi->stat_lock); - init_rwsem(&sbi->bio_sem); + + for (i = 0; i < NR_PAGE_TYPE; i++) + mutex_init(&sbi->write_mutex[i]); + init_rwsem(&sbi->cp_rwsem); init_waitqueue_head(&sbi->cp_wait); init_sb_info(sbi); |