diff options
Diffstat (limited to 'fs/btrfs/file.c')
| -rw-r--r-- | fs/btrfs/file.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/fs/btrfs/file.c b/fs/btrfs/file.c index 71c2dc1ea15..7f4654a1520 100644 --- a/fs/btrfs/file.c +++ b/fs/btrfs/file.c @@ -1472,6 +1472,7 @@ static ssize_t btrfs_file_aio_write(struct kiocb *iocb, ssize_t num_written = 0; ssize_t err = 0; size_t count, ocount; + bool sync = (file->f_flags & O_DSYNC) || IS_SYNC(file->f_mapping->host); sb_start_write(inode->i_sb); @@ -1529,6 +1530,9 @@ static ssize_t btrfs_file_aio_write(struct kiocb *iocb, } } + if (sync) + atomic_inc(&BTRFS_I(inode)->sync_writers); + if (unlikely(file->f_flags & O_DIRECT)) { num_written = __btrfs_direct_write(iocb, iov, nr_segs, pos, ppos, count, ocount); @@ -1563,6 +1567,8 @@ static ssize_t btrfs_file_aio_write(struct kiocb *iocb, num_written = err; } out: + if (sync) + atomic_dec(&BTRFS_I(inode)->sync_writers); sb_end_write(inode->i_sb); current->backing_dev_info = NULL; return num_written ? num_written : err; @@ -1613,7 +1619,9 @@ int btrfs_sync_file(struct file *file, loff_t start, loff_t end, int datasync) * out of the ->i_mutex. If so, we can flush the dirty pages by * multi-task, and make the performance up. */ + atomic_inc(&BTRFS_I(inode)->sync_writers); ret = filemap_write_and_wait_range(inode->i_mapping, start, end); + atomic_dec(&BTRFS_I(inode)->sync_writers); if (ret) return ret; |