This series adds a throttle block driver filter. Currently throttling is done at the BlockBackend level. Using block driver interfaces we can move the throttling to any point in the BDS graph using a throttle node which uses the existing throttling code. This allows for potentially more complex configurations (throttling at any point in the graph, chained filters)
There's also the question of how filter drivers affect the rest of the block layer, especially live block jobs. This won't be tackled in this series though. Manos Pitsidianakis (7): block: move ThrottleGroup membership to ThrottleGroupMember block: add aio_context field in ThrottleGroupMember block: tidy ThrottleGroupMember initializations block: convert ThrottleGroup to object with QOM block: add throttle block filter driver block: add BlockDevOptionsThrottle to QAPI block: add throttle block filter driver interface tests block/Makefile.objs | 1 + block/block-backend.c | 61 +-- block/qapi.c | 8 +- block/throttle-groups.c | 820 +++++++++++++++++++++++++++++++--------- block/throttle.c | 345 +++++++++++++++++ blockdev.c | 4 +- include/block/throttle-groups.h | 47 ++- include/qemu/throttle-options.h | 60 ++- include/qemu/throttle.h | 3 + include/sysemu/block-backend.h | 20 +- qapi/block-core.json | 65 +++- tests/qemu-iotests/184 | 237 ++++++++++++ tests/qemu-iotests/184.out | 319 ++++++++++++++++ tests/qemu-iotests/group | 1 + tests/test-throttle.c | 111 +++--- util/throttle.c | 121 ++++++ 16 files changed, 1913 insertions(+), 310 deletions(-) create mode 100644 block/throttle.c create mode 100755 tests/qemu-iotests/184 create mode 100644 tests/qemu-iotests/184.out -- 2.11.0
