diff options
| author | J. Bruce Fields <bfields@redhat.com> | 2012-10-10 02:35:22 +0400 |
|---|---|---|
| committer | J. Bruce Fields <bfields@redhat.com> | 2012-10-10 02:35:22 +0400 |
| commit | f474af7051212b4efc8267583fad9c4ebf33ccff (patch) | |
| tree | 1aa46ebc8065a341f247c2a2d9af2f624ad1d4f8 /fs/ext4/indirect.c | |
| parent | 0d22f68f02c10d5d10ec5712917e5828b001a822 (diff) | |
| parent | e3dd9a52cb5552c46c2a4ca7ccdfb4dab5c72457 (diff) | |
| download | linux-f474af7051212b4efc8267583fad9c4ebf33ccff.tar.xz | |
nfs: disintegrate UAPI for nfs
This is to complete part of the Userspace API (UAPI) disintegration for which
the preparatory patches were pulled recently. After these patches, userspace
headers will be segregated into:
include/uapi/linux/.../foo.h
for the userspace interface stuff, and:
include/linux/.../foo.h
for the strictly kernel internal stuff.
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
Diffstat (limited to 'fs/ext4/indirect.c')
| -rw-r--r-- | fs/ext4/indirect.c | 18 |
1 files changed, 16 insertions, 2 deletions
diff --git a/fs/ext4/indirect.c b/fs/ext4/indirect.c index 830e1b2bf145..792e388e7b44 100644 --- a/fs/ext4/indirect.c +++ b/fs/ext4/indirect.c @@ -807,16 +807,30 @@ ssize_t ext4_ind_direct_IO(int rw, struct kiocb *iocb, retry: if (rw == READ && ext4_should_dioread_nolock(inode)) { - if (unlikely(!list_empty(&ei->i_completed_io_list))) { + if (unlikely(atomic_read(&EXT4_I(inode)->i_unwritten))) { mutex_lock(&inode->i_mutex); - ext4_flush_completed_IO(inode); + ext4_flush_unwritten_io(inode); mutex_unlock(&inode->i_mutex); } + /* + * Nolock dioread optimization may be dynamically disabled + * via ext4_inode_block_unlocked_dio(). Check inode's state + * while holding extra i_dio_count ref. + */ + atomic_inc(&inode->i_dio_count); + smp_mb(); + if (unlikely(ext4_test_inode_state(inode, + EXT4_STATE_DIOREAD_LOCK))) { + inode_dio_done(inode); + goto locked; + } ret = __blockdev_direct_IO(rw, iocb, inode, inode->i_sb->s_bdev, iov, offset, nr_segs, ext4_get_block, NULL, NULL, 0); + inode_dio_done(inode); } else { +locked: ret = blockdev_direct_IO(rw, iocb, inode, iov, offset, nr_segs, ext4_get_block); |