Nathan March
2011-Aug-22 20:22 UTC
[Xen-devel] 4.1.1 dom0 kernel panic "No available IRQ to bind to: increae nr_irqs!"
Hi, 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 2.6.32.43 kernel from jeremy xen.git. I do have sparse IRQ''s on: CONFIG_SPARSE_IRQ=y 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 that I can see... Can anyone point me in the right direction to resolve this? Thanks, Nathan _______________________________________________ Xen-devel mailing list Xen-devel@lists.xensource.com http://lists.xensource.com/xen-devel
Konrad Rzeszutek Wilk
2011-Aug-22 20:59 UTC
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:> Hi, > > 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 2.6.32.43 kernel from jeremy xen.git. > > I do have sparse IRQ''s on: > CONFIG_SPARSE_IRQ=y > > 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 anywhereNot 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.> > Thanks, > Nathan > > _______________________________________________ > Xen-devel mailing list > Xen-devel@lists.xensource.com > http://lists.xensource.com/xen-devel_______________________________________________ Xen-devel mailing list Xen-devel@lists.xensource.com http://lists.xensource.com/xen-devel