Re: [Xen-devel] network (irq?) problems in unstable

[Keir Fraser <Keir.Fraser@xxxxxxxxxxxx>]

On 30 May 2005, at 13:52, Gerd Knorr wrote:

> With xen unstable I have the problem that the network stops
> working after a while.  Heavy network traffic seems to make it
> more likely, it triggers almost every time I try to untar a
> kernel source tree, where the tarball comes from a NFS-mounted
> volume.
>
> The network card doesn't receive interrupts any more according
> to /proc/interrupts.  It works fine in native linux and also
> with xen 2.0.  It's a tulip card.  Anyone has an idea what this
> might be or where to look?
The new IRQ code in unstable is not so well tested on non-ACPI and 
non-IOAPIC systems (most of our boxes are SMP servers). May be worth 
looking at boot-time output of Xen vs. native Linux. Also, particularly 
if you have a null modem cable attached, add tracing on a debug key to 
see what Xen thinks the status of each IRQ line is (disabled, 
in_progress, etc.). Managing IRQ lines via legacy PIC is pretty 
straightforward so this can't really be that hard a bug to fix I think 
(hope). :-)
 -- Keir


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