The subject was discussed here: https://lists.gnu.org/archive/html/qemu-devel/2017-05/msg00206.html
This series is a solution for the issue with QMP monitor buffered input. A little parser is introduced to throttle JSON commands read from the buffer so that QMP requests do not overwhelm the monitor input queue. A side effect raised in the test #247 was managed in the first patch. It may be considered as a workaround. Any sane fix suggested will be appreciated. Note: This series goes after the Vladimir's one: '[PATCH v3 00/25] backup performance: block_status + async"' To make the test #129 passed, the following patch should be applied first: '[PATCH v3 01/25] iotests: 129 don't check backup "busy"'. Andrey Shinkevich (2): iotests: add another bash sleep command to 247 monitor: increase amount of data for monitor to read chardev/char-fd.c | 64 +++++++++++++++++++++++++++++++++++++++++++++- chardev/char-socket.c | 54 +++++++++++++++++++++++++++----------- chardev/char.c | 40 +++++++++++++++++++++++++++++ include/chardev/char.h | 15 +++++++++++ monitor/monitor.c | 2 +- tests/qemu-iotests/247 | 2 ++ tests/qemu-iotests/247.out | 1 + 7 files changed, 161 insertions(+), 17 deletions(-) -- 1.8.3.1