Re: [libvirt] [PATCH 0/6 v3] Add blkio cgroup support
> 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.
Yes, you are right.
whew :)
> 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.
how about the start Guest with option "cache=none" to bypass pagecache?
This should help i think.
I will read up on where to set that and give it a try. Thanks for the hint.
>
> Did your tests show something different? Maybe I did things wrong then.
I think blkio cgroup should work if "cache=none" is set. But I didn't try
it,
Will try it later.
Please let us know what you found out during your tests.
Regards
Dominik