[PATCH 0/9] barrier support for request-based dm

[Kiyoshi Ueda <k-ueda@ct.jp.nec.com>]

Hi Alasdair,

This patch-set adds barrier support for request-based dm-multipath.
It is made on top of 2.6.32-rc4 + the patches below:
  o http://git.kernel.org/?p=linux/kernel/git/axboe/linux-2.6-block.git;a=commit;h=a9327cac440be4d8333bba975cbbf76045096275
    (Seperate read and write statistics of in_flight requests)

  o The patches below in the Alasdair's editing tree:
      dm-add-missing-del_gendisk-to-alloc_dev-error-path.patch
      dm-dec_pending-needs-locking-to-save-error-value.patch
      dm-ioctl-prefer-strlcpy-over-strncpy.patch
      dm-trace-request-based-remapping.patch

Most patches are clean-ups and refactorings for preparation of
the last patch.

Please review and apply if no problem.

Summary of the patch-set:
  1/9: dm core: clean up in-flight checking
  2/9: rqdm core: map_request() takes clone instead of orig
  3/9: rqdm core: alloc_rq_tio() takes gfp_mask
  4/9: rqdm core: clean up request cloning
  5/9: rqdm core: simplify suspend code
  6/9: rqdm core: use md->pending for in_flight I/O counting
  7/9: rqdm core: refactor completion functions
  8/9: rqdm core: move dm_end_request()
  9/9: rqdm core: add barrier support

 drivers/md/dm.c |  582 +++++++++++++++++++++++++++++++-------------------------
 1 file changed, 323 insertions(+), 259 deletions(-)

Thanks,
Kiyoshi Ueda