[git pull] device mapper fixes for 4.12-rc2

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Hi Linus,

The following changes since commit 2ea659a9ef488125eb46da6eb571de5eae5c43f6:

  Linux 4.12-rc1 (2017-05-13 13:19:49 -0700)

are available in the git repository at:

  git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm.git tags/for-4.12/dm-fixes-2

for you to fetch changes up to 7e1b9521f5a8356553f5e58b07952bf346632ea4:

  dm cache: handle kmalloc failure allocating background_tracker struct (2017-05-17 09:44:53 -0400)

Please pull, thanks.
Mike

----------------------------------------------------------------
- A couple DM thin provisioning fixes

- A few request-based DM and DM multipath fixes for issues that were
  made when merging Christoph's changes with Bart's changes for 4.12

- A DM bufio unsigned overflow fix

- A couple pure fixes for the DM cache target.

- Various very small tweaks to the DM cache target that enable
  considerable speed improvements in the face of continuous IO.  Given
  that the cache target was significantly reworked for 4.12 I see no
  reason to sit on these advances until 4.13 considering the favorable
  results associated with such minimalist tweaks.

----------------------------------------------------------------
Christoph Hellwig (3):
      dm rq: add a missing break to map_request
      dm mpath: don't return -EIO from dm_report_EIO
      dm mpath: multipath_clone_and_map must not return -EIO

Colin Ian King (1):
      dm cache: handle kmalloc failure allocating background_tracker struct

Joe Thornber (10):
      dm cache: fix incorrect 'idle_time' reset in IO tracker
      dm cache policy smq: only demote entries in bottom half of the clean multiqueue
      dm cache policy smq: be more aggressive about triggering a writeback
      dm cache policy smq: put newly promoted entries at the top of the multiqueue
      dm cache policy smq: stop preemptively demoting blocks
      dm cache: track all IO to the cache rather than just the origin device's IO
      dm cache: simplify the IDLE vs BUSY state calculation
      dm cache policy smq: don't do any writebacks unless IDLE
      dm thin metadata: call precommit before saving the roots
      dm space map disk: fix some book keeping in the disk space map

Mikulas Patocka (1):
      dm bufio: make the parameter "retain_bytes" unsigned long

 drivers/md/dm-bufio.c                          | 16 ++++++-------
 drivers/md/dm-cache-background-tracker.c       |  5 +++++
 drivers/md/dm-cache-policy-smq.c               | 31 ++++++++++----------------
 drivers/md/dm-cache-target.c                   | 27 +++++++++++-----------
 drivers/md/dm-mpath.c                          | 19 +++++++++-------
 drivers/md/dm-rq.c                             |  1 +
 drivers/md/dm-thin-metadata.c                  |  4 ++--
 drivers/md/persistent-data/dm-space-map-disk.c | 15 ++++++++++++-
 8 files changed, 66 insertions(+), 52 deletions(-)

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