On 11/13/2010 1:13 AM, Ian Pratt wrote:
>> >  What do the guests use for storage? (e.g. "blktap2 for VHD files on
>> an iscsi mounted ext3 volume")
>>
>> Simple sparse .img files on a local ext4 RAID volume, using "file:".
> Ah, if you're using loop it may be that you're just filling memory 
> with dirty pages. Older kernels certainly did this, not sure about 
> newer ones.
>
> I'd be inclined to use blktap2 in raw file mode, with "aio:".
>
> Ian

That makes sense. tap/tap2 didn't work for me in prior releases, so I 
had to stick to file. It seems to work now (well, tap2:tapdisk:aio does; 
tap:tapdisk:aio still doesn't), so I'll switch everything over to it, 
and cross my fingers.

-John