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| author | Mingming <cmm@us.ibm.com> | 2009-11-10 10:48:04 -0500 |
|---|---|---|
| committer | Theodore Ts'o <tytso@mit.edu> | 2009-11-10 10:48:04 -0500 |
| commit | 5f5249507e4b5c4fc0f9c93f33d133d8c95f47e1 (patch) | |
| tree | 0b0a790f568c07298c3a4122572e84392c787648 /fs/ext4/inode.c | |
| parent | 109f55651954def97fa41ee71c464d268c512ab0 (diff) | |
| download | linux-stable-5f5249507e4b5c4fc0f9c93f33d133d8c95f47e1.tar.gz linux-stable-5f5249507e4b5c4fc0f9c93f33d133d8c95f47e1.tar.bz2 linux-stable-5f5249507e4b5c4fc0f9c93f33d133d8c95f47e1.zip | |
ext4: skip conversion of uninit extents after direct IO if there isn't any
At the end of direct I/O operation, ext4_ext_direct_IO() always called
ext4_convert_unwritten_extents(), regardless of whether there were any
unwritten extents involved in the I/O or not.
This commit adds a state flag so that ext4_ext_direct_IO() only calls
ext4_convert_unwritten_extents() when necessary.
Signed-off-by: Mingming Cao <cmm@us.ibm.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Diffstat (limited to 'fs/ext4/inode.c')
| -rw-r--r-- | fs/ext4/inode.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c index 12d727f8fedf..a9ed2bce74d1 100644 --- a/fs/ext4/inode.c +++ b/fs/ext4/inode.c @@ -3772,7 +3772,8 @@ static ssize_t ext4_ext_direct_IO(int rw, struct kiocb *iocb, if (ret != -EIOCBQUEUED && ret <= 0 && iocb->private) { ext4_free_io_end(iocb->private); iocb->private = NULL; - } else if (ret > 0) { + } else if (ret > 0 && (EXT4_I(inode)->i_state & + EXT4_STATE_DIO_UNWRITTEN)) { int err; /* * for non AIO case, since the IO is already @@ -3782,6 +3783,7 @@ static ssize_t ext4_ext_direct_IO(int rw, struct kiocb *iocb, offset, ret); if (err < 0) ret = err; + EXT4_I(inode)->i_state &= ~EXT4_STATE_DIO_UNWRITTEN; } return ret; } |