On Thu 15 Oct 2015 04:58:22 PM CEST, Stefan Hajnoczi wrote:
>> > If I/O accounting isn't being used then all fields will be 0?
>>
>> Yes, but there's no way to tell if that happens because I/O
>> accounting is not supported or because there hasn't been any I/O yet.
>>
>> There's one additional
query-blockstats always returns a BlockDeviceStats structure for each
BDS, regardless of whether it implements accounting or not. Since the
field is mandatory there's no way to tell that from the values alone.
This field solves that problem by indicating which BDSs support I/O
accounting.
