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Re: [Xen-devel] 4.1.1 dom0 kernel panic "No available IRQ to bind to: increae nr_irqs!"
On Mon, Aug 22, 2011 at 01:22:06PM -0700, Nathan March wrote:
> I've run into an issue where after spawning more than ~22 VMs, the dom0
> will panic with:
> Kernel panic - not syncing: No available IRQ to bind to: increase nr_irqs!
> xen7 ~ # dmesg | grep IRQ
> [ 40.430664] NR_IRQS:4352 nr_irqs:512
> This is on xen 4.1.1 with the 220.127.116.11 kernel from jeremy xen.git.
> I do have sparse IRQ's on:
> I've found numerous comments about this online, but they primarily seem
> to apply to earlier versions of xen. More recent comments seem to
> indicate it shouldn't be a problem since the IRQ's are dynamically
> increased? The kernel doesn't seem to have NR_IRQS specified anywhere
Not that version of kernel.
> that I can see...
> Can anyone point me in the right direction to resolve this?
Update the kernel to 3.0. We added a lot of fixes to make the IRQ dynamic
so that you can have as many IRQs as much as there is memory to allocate them.
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