[git pull] device mapper changes for 3.17

[Mike Snitzer]

Hi Linus,

The following changes since commit 44fa816bb778edbab6b6ddaaf24908dd6295937e:

  dm cache: fix race affecting dirty block count (2014-08-01 12:25:22 -0400)

are available in the git repository at:

  git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm.git tags/dm-3.17-changes

for you to fetch changes up to 200612ec33e555a356eebc717630b866ae2b694f:

  dm table: propagate QUEUE_FLAG_NO_SG_MERGE (2014-08-10 20:54:49 -0400)

Please pull, thanks.
Mike

----------------------------------------------------------------
. Allow the thin target to paired with any size external origin; also
  allow thin snapshots to be larger than the external origin.

. Add support for quickly loading a repetitive pattern into the
  dm-switch target.

. Use per-bio data in the dm-crypt target instead of always using a
  mempool for each allocation.  Required switching to kmalloc alignment
  for the bio slab.

. Fix DM core to properly stack the QUEUE_FLAG_NO_SG_MERGE flag

. Fix the dm-cache and dm-thin targets' export of the minimum_io_size to
  match the data block size -- this fixes an issue where mkfs.xfs would
  improperly infer raid striping was in place on the underlying storage.

. Small cleanups in dm-io, dm-mpath and dm-cache

----------------------------------------------------------------
Jeff Moyer (1):
      dm table: propagate QUEUE_FLAG_NO_SG_MERGE

Joe Thornber (5):
      dm io: simplify dec_count and sync_io
      dm thin: switch to an atomic_t for tracking pending new block preparations
      dm thin: relax external origin size constraints
      dm cache: simplify deferred set reference count increments
      dm cache: fail migrations in the do_worker error path

Mike Snitzer (4):
      dm mpath: eliminate pg_ready() wrapper
      dm cache metadata: use dm-space-map-metadata.h defined size limits
      dm thin: set minimum_io_size to pool's data block size
      dm cache: set minimum_io_size to cache's data block size

Mikulas Patocka (5):
      dm table: make dm_table_supports_discards static
      block: use kmalloc alignment for bio slab
      dm crypt: use per-bio data
      dm switch: factor out switch_region_table_read
      dm switch: efficiently support repetitive patterns

 Documentation/device-mapper/switch.txt |  12 +++
 block/bio.c                            |   3 +-
 drivers/md/dm-cache-metadata.c         |   4 +-
 drivers/md/dm-cache-metadata.h         |   8 +-
 drivers/md/dm-cache-target.c           | 128 ++++++++++++++---------
 drivers/md/dm-crypt.c                  |  41 +++++---
 drivers/md/dm-io.c                     |  77 +++++++-------
 drivers/md/dm-mpath.c                  |   6 +-
 drivers/md/dm-switch.c                 |  67 ++++++++++--
 drivers/md/dm-table.c                  |  86 +++++++++-------
 drivers/md/dm-thin.c                   | 181 +++++++++++++++++++++++----------
 drivers/md/dm.h                        |   1 -
 12 files changed, 408 insertions(+), 206 deletions(-)
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