This series introduces an option to calculate and allocate
automatically enough qcow2 L2 cache to cover the entire image.
Using cache that covers the entire image can benefit performance,
while having only a small memory overhead (just 1 MB for every 8 GB
of virtual image size with the default cluster size).

-------------------------
Differences from v1:

1) Documentation fixes in qapi/block-core.json and qemu-options.hx
2) Removal of the patch which was made to fix the default sizes in
   docs/qcow2-cache.txt - it is not needed, as the default sizes imply
   also default cluster sizes.
3) Documentation fixes in docs/qcow2-cache.txt, mentioning mutual
   exclusivity of the options.
4) Squashing the iotests patch into the main feature addition patch

Leonid Bloch (2):
  qcow2: Introduce an option for sufficient L2 cache for the entire
    image
  docs: Document the l2-cache-full option

 block/qcow2.c              | 37 +++++++++++++++++++++++++++++--------
 block/qcow2.h              |  1 +
 docs/qcow2-cache.txt       | 18 ++++++++++++++----
 qapi/block-core.json       |  8 +++++++-
 qemu-options.hx            | 19 +++++++++++++++----
 tests/qemu-iotests/103     |  6 ++++++
 tests/qemu-iotests/103.out |  4 +++-
 tests/qemu-iotests/137     |  2 ++
 tests/qemu-iotests/137.out |  4 +++-
 9 files changed, 80 insertions(+), 19 deletions(-)

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2.14.1