-stable review patch. If anyone has any objections, please let us know. ------------------ From: Aneesh Kumar K.V (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 Signed-off-by: "Theodore Ts'o" Signed-off-by: Greg Kroah-Hartman --- fs/ext4/file.c | 3 ++- fs/ext4/inode.c | 8 ++++++++ 2 files changed, 10 insertions(+), 1 deletion(-) --- a/fs/ext4/file.c +++ b/fs/ext4/file.c @@ -39,7 +39,8 @@ static int ext4_release_file (struct ino } /* 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_reservation(inode); --- a/fs/ext4/inode.c +++ b/fs/ext4/inode.c @@ -1046,6 +1046,14 @@ static void ext4_da_update_reserve_space EXT4_I(inode)->i_reserved_meta_blocks = mdb; EXT4_I(inode)->i_allocated_meta_blocks = 0; 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_reservation(inode); } /* -- To unsubscribe from this list: send the line "unsubscribe linux-ext4" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html