Strange Error Regarding Grant Tables

Strange Error Regarding Grant Tables

[Jayson Vantuyl]

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I asked this on the users list but didn't get a response.  Maybe you  
guys can help.

When I do "xm dmesg", I see a number of errors like these:

(XEN) grant_table.c:799:d0 Bad flags (0) or dom (0). (expected dom 0)
(XEN) grant_table.c:799:d0 Bad flags (0) or dom (0). (expected dom 0)
(XEN) mm.c:566:d35 Non-privileged (35) attempt to map I/O space 000000f0
(XEN) grant_table.c:799:d0 Bad flags (0) or dom (0). (expected dom 0)
(XEN) grant_table.c:799:d0 Bad flags (0) or dom (0). (expected dom 0)
(XEN) grant_table.c:799:d0 Bad flags (0) or dom (0). (expected dom 0)
(XEN) grant_table.c:799:d0 Bad flags (0) or dom (0). (expected dom 0)
(XEN) grant_table.c:799:d0 Bad flags (0) or dom (0). (expected dom 0)
(XEN) mm.c:566:d36 Non-privileged (36) attempt to map I/O space 000000f0
(XEN) mm.c:566:d37 Non-privileged (37) attempt to map I/O space 000000f0
(XEN) grant_table.c:799:d0 Bad flags (0) or dom (0). (expected dom 0)
(XEN) grant_table.c:799:d0 Bad flags (0) or dom (0). (expected dom 0)
(XEN) grant_table.c:799:d0 Bad flags (0) or dom (0). (expected dom 0)
(XEN) grant_table.c:799:d0 Bad flags (0) or dom (0). (expected dom 0)
(XEN) grant_table.c:799:d0 Bad flags (0) or dom (0). (expected dom 0)
(XEN) grant_table.c:799:d0 Bad flags (0) or dom (0). (expected dom 0)
(XEN) grant_table.c:799:d0 Bad flags (0) or dom (0). (expected dom 0)
(XEN) grant_table.c:799:d0 Bad flags (0) or dom (0). (expected dom 0)
(XEN) grant_table.c:799:d0 Bad flags (0) or dom (0). (expected dom 0)
(XEN) grant_table.c:799:d0 Bad flags (0) or dom (0). (expected dom 0)

I'm not positive, but they appear to coincide with a lot of block  
traffic.  Otherwise the system seems to work, although has erratic  
slowdowns.  Is this bad?

-- 
Jayson Vantuyl
Systems Architect
Engine Yard
jvantuyl@engineyard.com



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Re: Strange Error Regarding Grant Tables

[Keir Fraser]

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On 27/2/07 12:48, "Jayson Vantuyl" <jvantuyl@engineyard.com> wrote:

> I'm not positive, but they appear to coincide with a lot of block traffic. 
> Otherwise the system seems to work, although has erratic slowdowns.  Is this
> bad?

It¹s not really a good sign. What Xen version do you use? What dom0 and
domU?

 -- Keir


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Re: Strange Error Regarding Grant Tables

[Jayson Vantuyl]

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Dom0:

Linux ey00-00 2.6.16.33-xen0 #1 SMP Sat Jan 27 01:21:23 PST 2007  
x86_64 Dual Core AMD Opteron(tm) Processor 265 AuthenticAMD GNU/Linux

DomU:

Linux ey00-s00000 2.6.16.33-xenU-domU #3 SMP Sat Jan 6 03:09:15 PST  
2007 x86_64 Dual Core AMD Opteron(tm) Processor 265 AuthenticAMD GNU/ 
Linux

On Feb 27, 2007, at 8:21 AM, Keir Fraser wrote:

>
>
>
> On 27/2/07 12:48, "Jayson Vantuyl" <jvantuyl@engineyard.com> wrote:
>
>> I'm not positive, but they appear to coincide with a lot of block  
>> traffic.  Otherwise the system seems to work, although has erratic  
>> slowdowns.  Is this bad?
>
> It’s not really a good sign. What Xen version do you use? What dom0  
> and domU?
>
>  -- Keir

-- 
Jayson Vantuyl
Systems Architect
Engine Yard
jvantuyl@engineyard.com



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Re: Strange Error Regarding Grant Tables

[Keir Fraser]

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The messages must come from the network receive path (packet transfer from
dom0 to domU). Do you notice poor network performance or outages? Are your
filesystems or block devices network mounted?

 -- Keir

On 28/2/07 07:29, "Jayson Vantuyl" <jvantuyl@engineyard.com> wrote:

> Dom0:
> 
> Linux ey00-00 2.6.16.33-xen0 #1 SMP Sat Jan 27 01:21:23 PST 2007 x86_64 Dual
> Core AMD Opteron(tm) Processor 265 AuthenticAMD GNU/Linux
> 
> DomU:
> 
> Linux ey00-s00000 2.6.16.33-xenU-domU #3 SMP Sat Jan 6 03:09:15 PST 2007
> x86_64 Dual Core AMD Opteron(tm) Processor 265 AuthenticAMD GNU/Linux
> 
> On Feb 27, 2007, at 8:21 AM, Keir Fraser wrote:
> 
>>  
>>  
>>  
>>  On 27/2/07 12:48, "Jayson Vantuyl" <jvantuyl@engineyard.com> wrote:
>>  
>>  
>>> I'm not positive, but they appear to coincide with a lot of block traffic. 
>>> Otherwise the system seems to work, although has erratic slowdowns.  Is this
>>> bad?
>>>  
>> 
>>  It¹s not really a good sign. What Xen version do you use? What dom0 and
>> domU?
>>  
>>   -- Keir
>>    
> 
>  
> -- 
> Jayson Vantuyl
> Systems Architect
> Engine Yard <http://www.engineyard.com>
> jvantuyl@engineyard.com
> 
>  
> 
> 
> 
> _______________________________________________
> Xen-devel mailing list
> Xen-devel@lists.xensource.com
> http://lists.xensource.com/xen-devel



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Re: Strange Error Regarding Grant Tables

[Jayson Vantuyl]

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Network performance appears okay, although I really am not positive.   
Our filesystems are not network mounted but we do use GFS (which has  
associated network traffic for clustering).

The block devices in the Dom0 are ATA-Over-Ethernet, so they do touch  
the networking code, but it doesn't go through the hypervisor (i.e.  
not to the DomUs).

On Feb 28, 2007, at 2:05 AM, Keir Fraser wrote:

> The messages must come from the network receive path (packet  
> transfer from dom0 to domU). Do you notice poor network performance  
> or outages? Are your filesystems or block devices network mounted?
>
>  -- Keir
>
> On 28/2/07 07:29, "Jayson Vantuyl" <jvantuyl@engineyard.com> wrote:
>
>> Dom0:
>>
>> Linux ey00-00 2.6.16.33-xen0 #1 SMP Sat Jan 27 01:21:23 PST 2007  
>> x86_64 Dual Core AMD Opteron(tm) Processor 265 AuthenticAMD GNU/Linux
>>
>> DomU:
>>
>> Linux ey00-s00000 2.6.16.33-xenU-domU #3 SMP Sat Jan 6 03:09:15  
>> PST 2007 x86_64 Dual Core AMD Opteron(tm) Processor 265  
>> AuthenticAMD GNU/Linux
>>
>> On Feb 27, 2007, at 8:21 AM, Keir Fraser wrote:
>>
>>>
>>>
>>>
>>>  On 27/2/07 12:48, "Jayson Vantuyl" <jvantuyl@engineyard.com> wrote:
>>>
>>>
>>>> I'm not positive, but they appear to coincide with a lot of  
>>>> block traffic.  Otherwise the system seems to work, although has  
>>>> erratic slowdowns.  Is this bad?
>>>>
>>>
>>>  It’s not really a good sign. What Xen version do you use? What  
>>> dom0 and domU?
>>>
>>>   -- Keir
>>>
>>
>>
>> -- 
>> Jayson Vantuyl
>> Systems Architect
>> Engine Yard <http://www.engineyard.com>
>> jvantuyl@engineyard.com
>>
>>
>>
>>
>> _______________________________________________
>> Xen-devel mailing list
>> Xen-devel@lists.xensource.com
>> http://lists.xensource.com/xen-devel
>



-- 
Jayson Vantuyl
Systems Architect
Engine Yard
jvantuyl@engineyard.com



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