diff options
| author | Jaegeuk Kim <jaegeuk@kernel.org> | 2015-03-13 21:44:36 -0700 |
|---|---|---|
| committer | Jaegeuk Kim <jaegeuk@kernel.org> | 2015-04-10 15:08:45 -0700 |
| commit | 78373b7319abdf15050af5b1632c4c8b8b398f33 (patch) | |
| tree | e4d8c016400ea53cd0a8a45984008b8f2c383190 /fs/f2fs | |
| parent | 3402e87cfb5e762f9c95071bf4a2ad65fd9392a2 (diff) | |
| download | op-kernel-dev-78373b7319abdf15050af5b1632c4c8b8b398f33.zip op-kernel-dev-78373b7319abdf15050af5b1632c4c8b8b398f33.tar.gz | |
f2fs: enhance multi-threads performance
Previously, f2fs_write_data_pages has a mutex, sbi->writepages, to serialize
data writes to maximize write bandwidth, while sacrificing multi-threads
performance.
Practically, however, multi-threads environment is much more important for
users. So this patch tries to remove the mutex.
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Diffstat (limited to 'fs/f2fs')
| -rw-r--r-- | fs/f2fs/data.c | 7 | ||||
| -rw-r--r-- | fs/f2fs/f2fs.h | 1 | ||||
| -rw-r--r-- | fs/f2fs/super.c | 1 |
3 files changed, 0 insertions, 9 deletions
diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c index 4a416e7..f0a18a005 100644 --- a/fs/f2fs/data.c +++ b/fs/f2fs/data.c @@ -1397,7 +1397,6 @@ static int f2fs_write_data_pages(struct address_space *mapping, { struct inode *inode = mapping->host; struct f2fs_sb_info *sbi = F2FS_I_SB(inode); - bool locked = false; int ret; long diff; @@ -1418,13 +1417,7 @@ static int f2fs_write_data_pages(struct address_space *mapping, diff = nr_pages_to_write(sbi, DATA, wbc); - if (!S_ISDIR(inode->i_mode)) { - mutex_lock(&sbi->writepages); - locked = true; - } ret = write_cache_pages(mapping, wbc, __f2fs_writepage, mapping); - if (locked) - mutex_unlock(&sbi->writepages); f2fs_submit_merged_bio(sbi, DATA, WRITE); diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h index 147ef31..dbe1144 100644 --- a/fs/f2fs/f2fs.h +++ b/fs/f2fs/f2fs.h @@ -613,7 +613,6 @@ struct f2fs_sb_info { struct mutex cp_mutex; /* checkpoint procedure lock */ struct rw_semaphore cp_rwsem; /* blocking FS operations */ struct rw_semaphore node_write; /* locking node writes */ - struct mutex writepages; /* mutex for writepages() */ wait_queue_head_t cp_wait; struct inode_management im[MAX_INO_ENTRY]; /* manage inode cache */ diff --git a/fs/f2fs/super.c b/fs/f2fs/super.c index f9dc543..fc6857f 100644 --- a/fs/f2fs/super.c +++ b/fs/f2fs/super.c @@ -1027,7 +1027,6 @@ try_onemore: sbi->raw_super = raw_super; sbi->raw_super_buf = raw_super_buf; mutex_init(&sbi->gc_mutex); - mutex_init(&sbi->writepages); mutex_init(&sbi->cp_mutex); init_rwsem(&sbi->node_write); clear_sbi_flag(sbi, SBI_POR_DOING); |
