[PULL REQUEST] md updates for 3.13

[NeilBrown]

The following changes since commit 39cf275a1a18ba3c7eb9b986c5c9b35b57332798:

  Merge branch 'sched-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip (2013-11-12 10:20:12 +0900)

are available in the git repository at:


  git://neil.brown.name/md/ tags/md/3.13

for you to fetch changes up to 60aaf933854511630e16be4efe0f96485e132de4:

  md/raid5: Use conf->device_lock protect changing of multi-thread resources. (2013-11-19 15:19:18 +1100)

----------------------------------------------------------------
md update for 3.13.

Mostly optimisations and obscure bug fixes.
 - raid5 gets less lock contention
 - raid1 gets less contention between normal-io and resync-io
   during resync.

----------------------------------------------------------------
Aurelien Jarno (1):
      UAPI: include <asm/byteorder.h> in linux/raid/md_p.h

Bian Yu (1):
      raid5: Retry R5_ReadNoMerge flag when hit a read error.

Joe Perches (1):
      md: Convert use of typedef ctl_table to struct ctl_table

NeilBrown (5):
      md: fix calculation of stacking limits on level change.
      md/raid5.c: add proper locking to error path of raid5_start_reshape.
      md: fix some places where mddev_lock return value is not checked.
      md: use MD_RECOVERY_INTR instead of kthread_should_stop in resync thread.
      md/raid5: avoid deadlock when raid5 array has unack badblocks during md_stop_writes.

Shaohua Li (3):
      wait: add wait_event_cmd()
      raid5: relieve lock contention in get_active_stripe()
      raid5: relieve lock contention in get_active_stripe()

majianpeng (8):
      raid5: Use slow_path to release stripe when mddev->thread is null
      raid1: Add a field array_frozen to indicate whether raid in freeze state.
      raid1: Replace raise_barrier/lower_barrier with freeze_array/unfreeze_array when reconfiguring the array.
      raid1: Add some macros to make code clearly.
      raid1: Rewrite the implementation of iobarrier.
      md/raid5: For stripe with R5_ReadNoMerge, we replace REQ_FLUSH with REQ_NOMERGE.
      md/raid5: Before freeing old multi-thread worker, it should flush them.
      md/raid5: Use conf->device_lock protect changing of multi-thread resources.

 drivers/md/md.c                | 133 +++++++------
 drivers/md/raid1.c             | 162 +++++++++++++---
 drivers/md/raid1.h             |  15 ++
 drivers/md/raid10.c            |   6 +-
 drivers/md/raid5.c             | 420 +++++++++++++++++++++++++++++++----------
 drivers/md/raid5.h             |  16 +-
 include/linux/wait.h           |  25 +++
 include/uapi/linux/raid/md_p.h |   1 +
 8 files changed, 592 insertions(+), 186 deletions(-)

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