[libvirt] [PATCHv2 37/62] qemu: process: Setup disk io throttling for -blockdev

[Chun Feng Wu]

Does this libvirt throttling support “chained throttle filters” for single disk 
described in QEMU doc: 
https://github.com/qemu/qemu/blob/master/docs/throttle.txt (“The 'throttle' 
block filter”)