Re: [libvirt] [PATCHv2 37/62] qemu: process: Setup disk io throttling for -blockdev
On Mon, Oct 16, 2023 at 13:36:42 +0000, Chun Feng Wu wrote:
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”)
No, libvirt currently still uses the older approach by using
'block_set_io_throttle' QMP command. This was used at the beginning
because the 'throttle' layer was not yet ready at the point when libvirt
adopted -blockdev.
It is sufficient for the throttling options that are currently
configurable via libvirt's XML.
Note that to use the full potential of the throttle groups and
hierarchical throttling will require significant re-engineering of the
XML configuration of throttling.