throttle: Allow I/O bursts for a user-defined period of time

Hi,

here's a new version of the series that adds support for performing I/O bursts for a user-defined period of time. Please follow the link to the first version of the series for a complete description.

There are two important changes in this version:

a) The previous series was broken because the new parameters were missing from qmp-commands.hx. This is fixed now. [patch 10]
b) This series has new tests and documentation [patches 14 and 16]

I also added myself as maintainer of the throttling code [patch 17].

Regards,

Berto

v2:
- Patch 10: Add the new parameters to qmp-commands.hx
- Patch 14: New iotest for this feature
- Patch 15: Fix typo in the API documentation
- Patch 16: New document that explains the throttling infrastructure
- Patch 17: Add myself as maintainer of the throttling code

v1: https://lists.gnu.org/archive/html/qemu-block/2016-02/msg00210.html
- Initial version

Alberto Garcia (17):
throttle: Make throttle_compute_timer() static
throttle: Make throttle_conflicting() set errp
throttle: Make throttle_max_is_missing_limit() set errp
throttle: Make throttle_is_valid() set errp
throttle: Set always an average value when setting a maximum value
throttle: Merge all functions that check the configuration into one
throttle: Use throttle_config_init() to initialize ThrottleConfig
throttle: Add support for burst periods
throttle: Add command-line settings to define the burst periods
qapi: Add burst length parameters to block_set_io_throttle
qapi: Add burst length fields to BlockDeviceInfo
throttle: Check that burst_level leaks correctly
throttle: Test throttle_compute_wait() during bursts
qemu-iotests: Extend iotest 093 to test bursts
qapi: Correct the name of the iops_rd parameter
docs: Document the throttling infrastructure
MAINTAINERS: Add myself as maintainer of the throttling code

 MAINTAINERS                |   9 ++
 block/qapi.c               |  20 ++++
 blockdev.c                 |  99 +++++++++++++-----
 docs/throttle.txt          | 252 +++++++++++++++++++++++++++++++++++++++++++++
 hmp.c                      |  12 +++
 include/qemu/throttle.h    |  55 +++++++---
 qapi/block-core.json       |  92 ++++++++++++++---
 qmp-commands.hx            |  25 +++--
 tests/qemu-iotests/093     |  65 +++++++++---
 tests/qemu-iotests/093.out |   4 +-
 tests/test-throttle.c      |  88 ++++++++++++----
 util/throttle.c            | 132 ++++++++++++++++--------
 12 files changed, 708 insertions(+), 145 deletions(-)
 create mode 100644 docs/throttle.txt

2.7.0