>> 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 -- libvir-list mailing list libvir-list@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/libvir-list