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| author | Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> | 2009-03-27 22:36:43 -0400 |
|---|---|---|
| committer | Theodore Ts'o <tytso@mit.edu> | 2009-03-27 22:36:43 -0400 |
| commit | d6014301b5599fba395c42a1e96a7fe86f7d0b2d (patch) | |
| tree | 5b3f8c034c69dfbcc0f4e155dc991179a95e170b /fs/ext4 | |
| parent | 8750c6d5fcbd3342b3d908d157f81d345c5325a7 (diff) | |
| download | linux-d6014301b5599fba395c42a1e96a7fe86f7d0b2d.tar.bz2 | |
ext4: Fix discard of inode prealloc space with delayed allocation.
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>
Diffstat (limited to 'fs/ext4')
| -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 80ed6dc9c9d2..7dcac9d7e491 100644 --- a/fs/ext4/inode.c +++ b/fs/ext4/inode.c @@ -1067,9 +1067,16 @@ static void ext4_da_update_reserve_space(struct inode *inode, int used) /* * free those over-booking quota for metadata blocks */ - if (mdb_free) vfs_dq_release_reservation_block(inode, mdb_free); + + /* + * 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); } /* |