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Re: [Xen-devel] pv_ops network lockups

On Mon, May 17, 2010 at 09:58:17AM -0400, Michael D Labriola wrote:
> I'm having some pretty ugly lockups with both the current xen/master and 
> xen/stable kernels in both Xen 3.4.2 and 4.0.  These crashes are only 
> happening on one specific box.  The specific hardware is:

Have you specifically used xen/stable-2.6.32.x branch? 
I think it's different from xen/stable.

-- Pasi
> mobo: Intel dp55kg
> cpu: Intel Core i5 570 (quad-core)
> ram: 4GB DDR3
> nic: onboard e1000e
> Everything (dom0, all domUs) is running 32bit.  I'm not passing any PCI 
> cards through.  Nothing fancy, here.
> 1. If dom0 receives multicast traffic from its domUs.  This seems to only 
> happen if I have multiple domUs with at least one of them sending out 
> multicast traffic to an address that dom0 is listening on.  Just write a 
> simple app to listen on a multicast socket and send traffic to that 
> channel on at least 1 domU, and dom0 kernel panics.  The panic message 
> seems to always have 'invalid opcode: 0000', pid: 0, comm: swapper, EIP at 
> gnttab_copy_grant_pageon, with a call trace containing some variant of a 
> list of network related functions (net_tx_action, netif_page_release, 
> e1000_clean, etc).
> 2. If dom0 creates an XDMCP session to one of its domUs.  This is really 
> strange.  Even running w/out KMS using the plain old vesa driver, if you 
> turn off opaque window moving and drag a window around the dom0 kernel 
> panics.  Also, if you let xscreensaver fade to black the dom0 kernel 
> panics.
> Both these problems ONLY happen when the domUs in question are running on 
> the dom0 (ie, XDMCP into a domU hosted by a different dom0 works 
> perfectly).  Also, both crashes happen regardless of how many vcpus dom0 
> has (ie, dom0_max_vcpus=1).
> Any ideas?
> -Mike
> PS - Wouldn't you know, this particular box doesn't have any serial ports. 
>  I'm overnighting a PCI serial cards so I can capture the panic messages 
> and send them to the list, too.
> ---
> Michael D Labriola
> Electric Boat
> mlabriol@xxxxxxxx
> 401-848-8871 (desk)
> 401-848-8513 (lab)
> 401-316-9844 (cell)
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