Subject: Re: DomU hangs with Xen 3.1
To: None <>
From: Sarton O'Brien <>
List: port-xen
Date: 09/19/2007 09:26:56
On Tue, 18 Sep 2007 06:58:23 pm John R. Shannon wrote:
> Since switching a server to 3.1 I've been experiencing infrequent hangs
> of various domUs. In a recent one, the console of a non-responsive domU
> showed:
> xbd0: grant still used by backend
> dom0 and domU are running NetBSD 4.99.30 on a Pentium 4 platform.

I'm not as knowledgeable as some on this list but if you provide some more 
details it may aide an answer, as this doesn't seem to be an issue I've seen 
before ...

* Are kernel and userland in sync?
* pkg listing for xen related software
* xen config (grub and domu)
* dmesg from xen, dom0 and domu if possible
* Any modifications to the kernel config
* What did you switch from? xen 3.0? on the same box?

I can't guarantee any of this is going to help but it may show an 
inconsistency somewhere. The other possibility is you hit a bad timeframe for 
cvs as you are running close to the latest current version.

And just curious as this is not necessarily related ... are you running serial 
console or vga?