v4: now based on Kevin's block-next
01: add Eric's r-b
02: - s/which/where/ [Eric, hope, I fixed correct one which from two:)]
    - s/it's/its
    add Eric's r-b
03: - r-b and t-b by Eric
    - grammar
    - drop trace from test

v3: don't filter mapping info from qemu-img map output, otherwise
    it don't show what I try to check [sorry for extra noise in list]

v2: [mostly by Eric's review]
01: new
02: point to bug introducing commit in cover letter [Eric]
     [but I failed to compile it, to check]
    drop s/INT_MAX/BDRV_REQUEST_MAX_BYTES/ chunk
03: - improve wording
    - cheating with preallocation=metadata and discards
      to make test quick and not eating disk space
    - use new trace-point
    - move it to be 250 iotest
    - filter out extra qemu-img info output

Based-on: git://repo.or.cz/qemu/kevin.git block-next

Vladimir Sementsov-Ogievskiy (3):
  block/qcow2-refcount: add trace-point to qcow2_process_discards
  block/io: bdrv_pdiscard: support int64_t bytes parameter
  iotests: test big qcow2 shrink

 include/block/block.h      |  4 +--
 block/io.c                 | 16 ++++-----
 block/qcow2-refcount.c     |  7 +++-
 block/trace-events         |  3 ++
 tests/qemu-iotests/250     | 72 ++++++++++++++++++++++++++++++++++++++
 tests/qemu-iotests/250.out | 21 +++++++++++
 tests/qemu-iotests/group   |  1 +
 7 files changed, 113 insertions(+), 11 deletions(-)
 create mode 100755 tests/qemu-iotests/250
 create mode 100644 tests/qemu-iotests/250.out

-- 
2.18.0