Re: [Xen-devel] Slow boot with 2.6.37-rc4

[Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>]

On Fri, Dec 03, 2010 at 10:20:55PM +0000, M A Young wrote:
> On Fri, 3 Dec 2010, Konrad Rzeszutek Wilk wrote:
> 
> >Can you pass in pci=nomsi on the Linux kernel line just to see if it is
> >indeed MSI (or vector) related.
> 
> I still see the delay with pci=nomsi. The dmseg output from that
> boot is attached.

It still looks to be using MSIs.. Maybe the command line parameter is wrong?
> 
> >And also under the Xen hypervisor serial line print out the PCI MSI irq and 
> >IRQ vectors
> >values? Don't remember the debug keys - but the point is to see if for your 
> >AHCI controller:
> >0000:00:1f.2 and 0000:00:1f.1, there is an MSI vector allocated for it.
> 
> I tried various xm debug-keys (M,Q,i and z) on a boot without
> pci=nomsi. The output of xm dmesg afterwards is attached.

Try it also on Xen line, thought I am not sure what the arguments
for disabling MSI in the hypervisor are.

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