[Qemu-devel] [PATCH 0/3] block: ignore flush requests when storage is clean

["Denis V. Lunev" <den@openvz.org>]

Changes from v2:
- Better comments
- Rebased on latest master

Changes from v1:
- Flush requests that should be skipped will now wait for completion
  of any previous requests already in flight
- Fixed IDE and AHCI tests to dirty media for new flush behaviour
- Fixed a problem in IDE CMD_FLUSH_CACHE failure handling

Signed-off-by: Evgeny Yakovlev <eyakovlev@virtuozzo.com>
Signed-off-by: Denis V. Lunev <den@openvz.org>
CC: Kevin Wolf <kwolf@redhat.com>
CC: Max Reitz <mreitz@redhat.com>
CC: Stefan Hajnoczi <stefanha@redhat.com>
CC: Fam Zheng <famz@redhat.com>
CC: John Snow <jsnow@redhat.com>

Evgeny Yakovlev (3):
  block: ignore flush requests when storage is clean
  ide: ignore retry_unit check for non-retry operations
  tests: in IDE and AHCI tests perform DMA write before flushing

 block.c                   |  1 +
 block/dirty-bitmap.c      |  3 +++
 block/io.c                | 19 +++++++++++++++++++
 hw/ide/core.c             |  3 ++-
 include/block/block_int.h |  2 ++
 tests/ahci-test.c         | 34 ++++++++++++++++++++++++++++++++--
 tests/ide-test.c          | 43 +++++++++++++++++++++++++++++++++++++++++++
 7 files changed, 102 insertions(+), 3 deletions(-)

-- 
2.1.4