responsiveness during IO tasks

[Alexander Motin]

Alexander Motin wrote:
> Julian Elischer wrote:
>>> Doug Barton wrote:
>>> No problem, just let's hunt things down. I'll wait for that larger post.
>>> In meantime, if it is related to eventtimers, it would be good to
>>> collect more detailed information. You could try to make timer run
>>> during idle (kern.eventtimer.idletick). You could try to switch timer
>>> from one-shot to periodic mode (kern.eventtimer.periodic). You could
>>> also try to switch to another timer (kern.eventtimer.timer).
>> kern.eventtimer.periodic needs to be disabled to run 9.x on xen
>> (as of a few months ago)
> 
> Yes, but it needs to be enabled (it is disabled by default). I remember
> about it and going to experiment with it nearest time.

Problem with Xen HVM freeze in one-shot mode workarounded by r221508.
Also, looking on Xen 4.1 sources, seems like problem was already fixed
from their side also.

-- 
Alexander Motin