Subject: Re: Xen2/NetBSD 3.1 DomU running slowly
To: Stephen Borrill <>
From: Johan Ihren <>
List: port-xen
Date: 05/31/2007 10:51:25
Hash: SHA1

> Every now and then I get reports of a customer's DomU running  
> slowly and, sure enough, when I connect it takes ages to login.  
> However, it's running at 100% idle and the other DomU on the same  
> box is fine. A reboot of the DomU fixes it. When it happened today,  
> I saw the following on the Dom0 console (which is running quickly  
> and responsively):
> xen_shm_map: ENOMEM
> xen_shm_map: ENOMEM1
> xvif3.0: can't map packet page
> The first two are debugging, I believe, but the third looks  
> suspicious...
> The kernels are 3.1_STABLE from 20th Nov 2006. Have there been  
> pullups that fix this, i.e. should I be updating? I'm not in a  
> position to upgrade to NetBSD 4.0/Xen3 at the moment.

I've seen the same console messages, repeatedly, in a Xen2/NetBSD  
4.0beta2 environment (both DOM0 and DOMU) from Dec'06/Jan'07.

I've not noticed the extreme slowness of the DOMUs though, but have  
not looked for it either.


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