[PATCH 0/3] Revert parallel dio reads

[Joseph Qi <joseph.qi@xxxxxxxxxxxxxxxxx>]

This patch set is trying to revert parallel dio reads feature at present
since it causes significant performance regression in mixed random
read/write scenario.

Joseph Qi (3):
  Revert "ext4: remove EXT4_STATE_DIOREAD_LOCK flag"
  Revert "ext4: fix off-by-one error when writing back pages before dio
    read"
  Revert "ext4: Allow parallel DIO reads"

 fs/ext4/ext4.h        | 17 +++++++++++++++++
 fs/ext4/extents.c     | 19 ++++++++++++++-----
 fs/ext4/inode.c       | 47 +++++++++++++++++++++++++++++++----------------
 fs/ext4/ioctl.c       |  4 ++++
 fs/ext4/move_extent.c |  4 ++++
 fs/ext4/super.c       | 12 +++++++-----
 6 files changed, 77 insertions(+), 26 deletions(-)

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1.8.3.1