Re: [Xen-devel] Re: CONFIG_SPARSE_IRQ breaks single VCPU domain 0 between xen/master and xen/next

[Ian Campbell <Ian.Campbell@xxxxxxxxxx>]

On Sun, 2010-02-28 at 12:01 +0000, Erik Brakkee wrote:
> Ian Campbell <Ian.Campbell <at> citrix.com> writes:
> 
> > 
> > With a single VCPU domain 0 (either due to hardware on dom0_max_vcpus=1)
> > and CONFIG_SPARSE_IRQ on xen/next I see:
> > 
> >         Kernel panic - not syncing: No available IRQ to bind to: increase
> nr_irqs! (currently 256, started from 256)
> > 
> 
> 
> The strange thing is that the kernel panic at boot also appears with 
> xen/master
> now. I am using the .config from
> http://wiki.xensource.com/xenwiki/XenParavirtOps. This behavior is occurring 
> on
> a Sony Vaio F11 laptop (Core i7 720QM, 8GB memory).
> 
> Is there a simple workaround for this problem?

I think the xen/master case is actually down to my "fix off-by-one error
in find_unbound_irq" change -- should probably be reverted.

Ian.


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