Re: [Xen-devel] Driver domain - NEW issue: IRQ handling error

["B.G. Bruce" <bgb@xxxxxxxxx>]

Yeah, the SATA and PATA contollers are grabbing 18 as well.  This box
doesn't have any SATA drives, so I can exclude 00:1f.2 (won't disable in
the bios), but what do I do about the PATA/EIDE (00:1f.1).  I need it!

B.



On Tue, 2005-02-01 at 21:28, Christian Limpach wrote:
> On Tue, 01 Feb 2005 09:11:34 -0400, B.G. Bruce <bgb@xxxxxxxxx> wrote:
> > dmesg on dom0 gives:
> > irq 18: nobody cared!
> > Disabling IRQ #18
> > 
> > and a dmesg of the driver domain shows that the nic hooked IRQ 18:
> > 
> > Intel(R) PRO/1000 Network Driver - version 5.5.4-k2-NAPI
> > Copyright (c) 1999-2004 Intel Corporation.
> > PCI: Obtained IRQ 18 for device 0000:01:01.0
> > PCI: Setting latency timer of device 0000:01:01.0 to 64
> > e1000: eth0: e1000_probe: Intel(R) PRO/1000 Network Connection
> 
> Do you have any other devices which get assigned IRQ 18?  Xen prints
> information about the interrupt routing when it starts, you can read
> this information with xm dmesg.  Also lspci -v should show for each
> device not hidden from dom0 which interrupt is used by the device. 
> FWIW, I've seen "irq nobody cared" on the IRQ assigned to the USB
> controller and a kernel without USB support.
> 
> > Am I correct in that the interrupt that should have been sent to the
> > driver domain was instead sent to dom0?  or what happened?  If I don't
> > have the driver dom setup correctly, would someone please explain what
> > I'm doing wrong?
> 
> Yes, it should have been sent to the driver domain.  If there's a 2nd
> device on IRQ 18 and this device is not hidden from dom0 and the 2nd
> device gets an interrupt, it will go to dom0.  This should be harmless
> but apparently, it's not.
> 
>      christian
> 


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