RE: [Xen-users] Blocked state in a DomU

Petersson, Mats
Wed, 23 Aug 2006 15:46:58 -0000

> -----Original Message-----
> From: xen-users-bounces@lists.xensource.com
> [mailto:xen-users-bounces@lists.xensource.com] On Behalf Of
> Lorena Giraldo G
> Sent: 23 August 2006 16:46
> To: xen-users@lists.xensource.com
> Subject: [Xen-users] Blocked state in a DomU
>
> Hi all!!
>
> How can i change the blocked state to run state in a DomU?
>
> Because when i said xm list show me these:
>
> Name                              ID Mem(MiB) VCPUs State  Time(s)
> Domain-0                           0     2781     4 r-----   652.4
> mv01                               3      128     1 -b----    15.4
> mv09                               5      128     3 -b----    16.8
>
> The Domain-0 state is in run but the other two vm''s are in
> blocked state

If you do xm list, Dom0 will ALWAYS be running, since it''s the domain
actually performing the "xm list" command, and thus must be running
during this.

If you have more than one processor (any combination of hyperthreading,
dual core or multiple individual processors), you can ALSO have DomU''s
running at the same time, assuming that they are actually having
something useful to do [like calculations or some such].

Running state is ONLY valid on a Domain that is ACTIVELY running.
Blocked is the normal state for a domain that is waiting for Dom0 to
perform something on it''s behalf, or for a when the domain is waiting
for an IO device [if it''s got hardware access to IO devices directly].
Waiting for Dom0 is also the case when the Domain is waiting for
keyboard/mouse input, for example sitting at a shell-prompt.

But unless you have more than one logical processor in the system,
you''ll never see anything but Dom0 in running state when you do xm
list,
as it HAS to run for xm list to happen...

--
Mats
>
> Somebody can help me?
>
> Thx
>
> Lore
> --
> Lorena Giraldo G
> Xtech - www.xtech.com.ar
> Ciudad Autonoma de Buenos Aires, Argentina
>
>
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