Re: [libvirt] [PATCH 0/6 v3] Add blkio cgroup support
Hmm.. "blkio.weight" is used to control the Minimal Maximal
Bandwidth. If you'd like
to control Max bandwidth to let your guests become I/O hungery.
"blkio.throttle.*"
should helps. But these tunables aren't supported by blkiotune for the time being.
I'm considering to implement them in the future.
Hm, maybe I was not clear then. Let me try to rephrase.
As far as I understand, and as far as I saw during my tests, the blkio
controller only works for sync I/O requests (eg dd with oflag=direct).
Buffered I/O is not part of the control.
And since a VM's I/O is most likely buffered in some fashion, this does
not have any effect. That's what my tests showed.
Did your tests show something different? Maybe I did things wrong then.
Regards
Dominik