[PATCH 0/7] ext4: Bunch of DIO/AIO fixes

There are number of races exist caused by lack of synchronization
between DIO workers and truncate/fsync/punch_hole routines
This patch series try to optimize and fix existing DIO/AIO code

TOC:
# first one is simply a cleanup
ext4: ext4_inode_info diet
# Cleanup and bug fixes
ext4: completed_io locking cleanup
ext4: serialize dio nonlocked reads with defrag workers V2
ext4: fsync should wait for DIO writers
ext4: serialize unlocked dio reads with truncate
ext4: endless truncate due to nonlocked dio readers V2
ext4: serialize truncate with owerwrite DIO workers V2

Signed-off-by: Dmitry Monakhov <redacted>