diff options
| author | Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> | 2009-06-02 08:07:49 -0400 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2009-06-15 09:40:31 -0700 |
| commit | ffe15619ef5a2e9108d13d822a9b475afb044155 (patch) | |
| tree | 20c23bfbd714d1f6897675b723b2e86d1fc9428b | |
| parent | f8d9f45f2368d85328f784c84854ca2cec8e38ea (diff) | |
ext4: Fix discard of inode prealloc space with delayed allocation.
(cherry picked from commit d6014301b5599fba395c42a1e96a7fe86f7d0b2d)
With delayed allocation we should not/cannot discard inode prealloc
space during file close. We would still have dirty pages for which we
haven't allocated blocks yet. With this fix after each get_blocks
request we check whether we have zero reserved blocks and if yes and
we don't have any writers on the file we discard inode prealloc space.
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
| -rw-r--r-- | fs/ext4/file.c | 3 | ||||
| -rw-r--r-- | fs/ext4/inode.c | 9 |
2 files changed, 10 insertions, 2 deletions
diff --git a/fs/ext4/file.c b/fs/ext4/file.c index 06df8272c639..588af8c77246 100644 --- a/fs/ext4/file.c +++ b/fs/ext4/file.c @@ -39,7 +39,8 @@ static int ext4_release_file(struct inode *inode, struct file *filp) } /* if we are the last writer on the inode, drop the block reservation */ if ((filp->f_mode & FMODE_WRITE) && - (atomic_read(&inode->i_writecount) == 1)) + (atomic_read(&inode->i_writecount) == 1) && + !EXT4_I(inode)->i_reserved_data_blocks) { down_write(&EXT4_I(inode)->i_data_sem); ext4_discard_preallocations(inode); diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c index afb3ea2d1cf3..9abf8c12c67d 100644 --- a/fs/ext4/inode.c +++ b/fs/ext4/inode.c @@ -1036,8 +1036,15 @@ static void ext4_da_update_reserve_space(struct inode *inode, int used) /* update per-inode reservations */ BUG_ON(used > EXT4_I(inode)->i_reserved_data_blocks); EXT4_I(inode)->i_reserved_data_blocks -= used; - spin_unlock(&EXT4_I(inode)->i_block_reservation_lock); + + /* + * If we have done all the pending block allocations and if + * there aren't any writers on the inode, we can discard the + * inode's preallocations. + */ + if (!total && (atomic_read(&inode->i_writecount) == 0)) + ext4_discard_preallocations(inode); } /* |