[Qemu-block] [PATCH v3 0/8] drive-mirror improvements

[Denis V. Lunev]

This patchset contains patches dealing with known-to-be-zero areas in drive
mirror from [PATCH 0/9] major rework of drive-mirror patchset.

Changes from v2:
- added mirror_throttle helper (patch 3) to address Eric' comment about
  last_time_ns
- comment tweaks (thank you, Eric)
- marked mirror_dirty_init as couroutine_fn

Changes from v1:
- only patches dealing with zeroes remains
- ported to current HEAD
- fixed issue with dirty-bitmap, int length is changed with int64
- fixed sectors_in_flight usage
- patch 6 is reworked taken into account bugs found in active mirror
- fixed patch 7
- direct checking of .bdrv_co_write_zeroes is replaced with
  bdrv_can_write_zeroes_with_unmap
  - added fixes for bdrv_can_write_zeroes_with_unmap

Signed-off-by: Denis V. Lunev <address@hidden>
CC: Stefan Hajnoczi <address@hidden>
CC: Fam Zheng <address@hidden>
CC: Kevin Wolf <address@hidden>
CC: Max Reitz <address@hidden>
CC: Jeff Cody <address@hidden>
CC: Eric Blake <address@hidden>

Denis V. Lunev (8):
  dirty-bitmap: operate with int64_t amount
  mirror: make sectors_in_flight int64_t
  mirror: create mirror_throttle helper
  mirror: create mirror_dirty_init helper for mirror_run
  block: remove extra condition in bdrv_can_write_zeroes_with_unmap
  mirror: optimize dirty bitmap filling in mirror_run a bit
  mirror: efficiently zero out target
  mirror: improve performance of mirroring of empty disk

 block.c                      |   2 +-
 block/dirty-bitmap.c         |   6 +-
 block/mirror.c               | 145 +++++++++++++++++++++++++++++--------------
 include/block/block_int.h    |   2 +-
 include/block/dirty-bitmap.h |   4 +-
 5 files changed, 106 insertions(+), 53 deletions(-)

-- 
2.5.0