On Fri, Sep 9, 2011 at 10:44 PM, Marcelo Tosatti <mtosatti@xxxxxxxxxx> wrote: > On Thu, Sep 08, 2011 at 06:11:07PM +0800, Zhi Yong Wu wrote: >> Note: >> 1.) When bps/iops limits are specified to a small value such as 511 bytes/s, this VM will hang up. We are considering how to handle this senario. > > You can increase the length of the slice, if the request is larger than > slice_time * bps_limit. Yeah, but it is a challenge for how to increase it. Do you have some nice idea? > >> 2.) When "dd" command is issued in guest, if its option bs is set to a large value such as "bs=1024K", the result speed will slightly bigger than the limits. > > Why? This issue has not existed. I will remove it. When drive bps=1000000, i did some testings on guest VM. 1.) bs=1024K 18+0 records in 18+0 records out 18874368 bytes (19 MB) copied, 26.6268 s, 709 kB/s 2.) bs=2048K 18+0 records in 18+0 records out 37748736 bytes (38 MB) copied, 46.5336 s, 811 kB/s > > There is lots of debugging leftovers in the patch. sorry, i forgot to remove them. > > -- Regards, Zhi Yong Wu -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
