* First DomU started goes into a busy loop
@ 2012-09-24 15:31 Anthony Wright
2012-09-24 17:18 ` Andrew Cooper
0 siblings, 1 reply; 6+ messages in thread
From: Anthony Wright @ 2012-09-24 15:31 UTC (permalink / raw)
To: xen-devel
On a 32 bit Xen 4.20 system with a 3.5.4 kernel around 40% of the time
when the system starts up the first DomU to be started goes into a busy
loop (always in state r----- which CPU constantly increasing) with no
console output. If I destroy the DomU and restart it with identical
settings, it starts correctly. I got the same happening with Xen 4.1
with a 3.5.3 kernel, but tried upgrading to see if that fixed it, but it
didn't.
If I connect to the console there's no output, and I can't get find any
useful information in the logs or xl dmesg. The DomU is running a 3.3.2
32 bit linux kernel.
Can you give me any suggestions how I might diagnose what's going on ?
thanks,
Anthony
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: First DomU started goes into a busy loop
2012-09-24 15:31 First DomU started goes into a busy loop Anthony Wright
@ 2012-09-24 17:18 ` Andrew Cooper
2012-09-25 8:20 ` Ian Campbell
0 siblings, 1 reply; 6+ messages in thread
From: Andrew Cooper @ 2012-09-24 17:18 UTC (permalink / raw)
To: xen-devel
On 24/09/12 16:31, Anthony Wright wrote:
> On a 32 bit Xen 4.20 system with a 3.5.4 kernel around 40% of the time
I assume you mean 4.2.0?
> when the system starts up the first DomU to be started goes into a busy
> loop (always in state r----- which CPU constantly increasing) with no
> console output. If I destroy the DomU and restart it with identical
> settings, it starts correctly. I got the same happening with Xen 4.1
> with a 3.5.3 kernel, but tried upgrading to see if that fixed it, but it
> didn't.
>
> If I connect to the console there's no output, and I can't get find any
> useful information in the logs or xl dmesg. The DomU is running a 3.3.2
> 32 bit linux kernel.
>
> Can you give me any suggestions how I might diagnose what's going on ?
32bit builds of Xen have been removed from 4.3. As far as I am aware,
there has been no serious effort to maintain them. I highly suggest
using a 64bit Xen.
~Andrew
>
> thanks,
>
> Anthony
>
>
> _______________________________________________
> Xen-devel mailing list
> Xen-devel@lists.xen.org
> http://lists.xen.org/xen-devel
--
Andrew Cooper - Dom0 Kernel Engineer, Citrix XenServer
T: +44 (0)1223 225 900, http://www.citrix.com
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: First DomU started goes into a busy loop
2012-09-24 17:18 ` Andrew Cooper
@ 2012-09-25 8:20 ` Ian Campbell
2012-09-25 16:30 ` Anthony Wright
0 siblings, 1 reply; 6+ messages in thread
From: Ian Campbell @ 2012-09-25 8:20 UTC (permalink / raw)
To: Andrew Cooper; +Cc: Anthony Wright, xen-devel@lists.xen.org
(putting Anthony back on the CC)
On Mon, 2012-09-24 at 18:18 +0100, Andrew Cooper wrote:
> 32bit builds of Xen have been removed from 4.3. As far as I am aware,
> there has been no serious effort to maintain them. I highly suggest
> using a 64bit Xen.
Anthony's references to 32-bit all seem to be in the context of the
Linux kernel.
Just to be clear we have removed support for the 32-bit hypervisor only.
We have not and will not be removing support for 32-bit (PAE) PV
domains, running as either guest or dom0 on a 64-bit hypervisor. 32-bit
HVM guests, with or without PAE enabled, also remain fully supported.
Ian.
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: First DomU started goes into a busy loop
2012-09-25 8:20 ` Ian Campbell
@ 2012-09-25 16:30 ` Anthony Wright
2012-09-25 16:33 ` Ian Campbell
2012-09-25 16:35 ` Andrew Cooper
0 siblings, 2 replies; 6+ messages in thread
From: Anthony Wright @ 2012-09-25 16:30 UTC (permalink / raw)
To: Ian Campbell; +Cc: Andrew Cooper, xen-devel@lists.xen.org
On 25/09/2012 09:20, Ian Campbell wrote:
> (putting Anthony back on the CC)
>
> On Mon, 2012-09-24 at 18:18 +0100, Andrew Cooper wrote:
>> 32bit builds of Xen have been removed from 4.3. As far as I am aware,
>> there has been no serious effort to maintain them. I highly suggest
>> using a 64bit Xen.
> Anthony's references to 32-bit all seem to be in the context of the
> Linux kernel.
>
> Just to be clear we have removed support for the 32-bit hypervisor only.
> We have not and will not be removing support for 32-bit (PAE) PV
> domains, running as either guest or dom0 on a 64-bit hypervisor. 32-bit
> HVM guests, with or without PAE enabled, also remain fully supported.
>
> Ian.
>
Could you give me some pointers regarding building a 64 bit Xen
hypervisor on a 32 bit linux system, or do I need to build it on a 64
bit system?
I've found the XEN_TARGET_ARCH setting in the makefile which looks like
setting it to x86_64 might be the right direction, but I'm trying to
determine if there's an "official" way of doing it.
thanks,
Anthony.
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: First DomU started goes into a busy loop
2012-09-25 16:30 ` Anthony Wright
@ 2012-09-25 16:33 ` Ian Campbell
2012-09-25 16:35 ` Andrew Cooper
1 sibling, 0 replies; 6+ messages in thread
From: Ian Campbell @ 2012-09-25 16:33 UTC (permalink / raw)
To: Anthony Wright; +Cc: Andrew Cooper, xen-devel@lists.xen.org
On Tue, 2012-09-25 at 17:30 +0100, Anthony Wright wrote:
> On 25/09/2012 09:20, Ian Campbell wrote:
> > (putting Anthony back on the CC)
> >
> > On Mon, 2012-09-24 at 18:18 +0100, Andrew Cooper wrote:
> >> 32bit builds of Xen have been removed from 4.3. As far as I am aware,
> >> there has been no serious effort to maintain them. I highly suggest
> >> using a 64bit Xen.
> > Anthony's references to 32-bit all seem to be in the context of the
> > Linux kernel.
> >
> > Just to be clear we have removed support for the 32-bit hypervisor only.
> > We have not and will not be removing support for 32-bit (PAE) PV
> > domains, running as either guest or dom0 on a 64-bit hypervisor. 32-bit
> > HVM guests, with or without PAE enabled, also remain fully supported.
> >
> > Ian.
> >
> Could you give me some pointers regarding building a 64 bit Xen
> hypervisor on a 32 bit linux system, or do I need to build it on a 64
> bit system?
>
> I've found the XEN_TARGET_ARCH setting in the makefile which looks like
> setting it to x86_64 might be the right direction, but I'm trying to
> determine if there's an "official" way of doing it.
That is the official way of doing it.
Ian.
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: First DomU started goes into a busy loop
2012-09-25 16:30 ` Anthony Wright
2012-09-25 16:33 ` Ian Campbell
@ 2012-09-25 16:35 ` Andrew Cooper
1 sibling, 0 replies; 6+ messages in thread
From: Andrew Cooper @ 2012-09-25 16:35 UTC (permalink / raw)
To: Anthony Wright; +Cc: Ian Campbell, xen-devel@lists.xen.org
On 25/09/12 17:30, Anthony Wright wrote:
> On 25/09/2012 09:20, Ian Campbell wrote:
>> (putting Anthony back on the CC)
>>
>> On Mon, 2012-09-24 at 18:18 +0100, Andrew Cooper wrote:
>>> 32bit builds of Xen have been removed from 4.3. As far as I am aware,
>>> there has been no serious effort to maintain them. I highly suggest
>>> using a 64bit Xen.
>> Anthony's references to 32-bit all seem to be in the context of the
>> Linux kernel.
>>
>> Just to be clear we have removed support for the 32-bit hypervisor only.
>> We have not and will not be removing support for 32-bit (PAE) PV
>> domains, running as either guest or dom0 on a 64-bit hypervisor. 32-bit
>> HVM guests, with or without PAE enabled, also remain fully supported.
>>
>> Ian.
>>
> Could you give me some pointers regarding building a 64 bit Xen
> hypervisor on a 32 bit linux system, or do I need to build it on a 64
> bit system?
>
> I've found the XEN_TARGET_ARCH setting in the makefile which looks like
> setting it to x86_64 might be the right direction, but I'm trying to
> determine if there's an "official" way of doing it.
>
> thanks,
>
> Anthony.
That is indeed the official way of doing it, with an optional
CROSS_COMPILE= prefix if your system gcc can only do 32bit.
--
Andrew Cooper - Dom0 Kernel Engineer, Citrix XenServer
T: +44 (0)1223 225 900, http://www.citrix.com
^ permalink raw reply [flat|nested] 6+ messages in thread
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2012-09-24 15:31 First DomU started goes into a busy loop Anthony Wright
2012-09-24 17:18 ` Andrew Cooper
2012-09-25 8:20 ` Ian Campbell
2012-09-25 16:30 ` Anthony Wright
2012-09-25 16:33 ` Ian Campbell
2012-09-25 16:35 ` Andrew Cooper
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