RE: Expected Behavior

[Jonathan Tripathy <jonnyt-Nf8S+5hNwl710XsdtD+oqA@public.gmane.org>]

On 31.08.2012 13:36, Jonathan Tripathy wrote:
> On 31.08.2012 04:47, James Harper wrote:
>>> Hi Kent,
>>>
>>> I'm going to try and reproduce it myself as well. I just used 
>>> IOMeter in a
>>> Windows DomU with 30 workers, each having an io depth of 256. A 
>>> *very*
>>> heavy workload indeed, but my point was to see if I could break 
>>> something.
>>> Unless the issue is specific to windows causing problems (NTFS or 
>>> whatever),
>>> I'm guessing running fio with 30 jobs and an iodepth of 256 would 
>>> probably
>>> produce a similar load.
>>>
>>> BTW, do you have access to a Xen node for testing?
>>>
>>
>> Does the problem resolve itself after you shut down the windows 
>> DomU?
>> Or only when you reboot the whole Dom0?
>>
>
> Hi There,
>
> I managed to reproduce this again. I have to reboot the entire Dom0
> (the physical server) for it to work properly again.
>
> James, are you able to reproduce this? Kent, are there any other
> tests/debug output you need from me?
>

BTW, I was using IOMeter's 'default' Access Specification with the 
following modifications: 100% random, 66% read, 33% write, and a 2kB 
size. My bcache is formatted for 512bytes.