Re: kexec + USB storage in 2.6.19

[ebiederm@xmission.com (Eric W. Biederman)]

Dan Aloni <da-x@monatomic.org> writes:

> Hello,
>
> After upgrading from 2.6.18.3 to 2.6.19.2 on an x86_64 machine I noticed 
> that the EHCI USB host is unable to work properly after a kexec invocation. 
> This makes it impossible to mount the rootfs in the configuration I'm using.
>
> According to the prints, the irq changes from 23 to 10.
>
> NOTE: Since the device is already connected at boot, I've added a patch 
> that disables the scanning delay for the first detected device, in order 
> to shorten the time it takes for the boot process. It worked on 2.6.18.3, 
> so I wonder what has changed...

At first glance it looks like acpi didn't come on in the kexec'd kernel.
Do you see anything like the line below.
> [ 78.139976] ACPI: PCI Interrupt 0000:00:1d.7[D] -> GSI 23 (level, low) -> IRQ

Could your provide the full bootlogs instead of these partial ones?
There is enough context missing I don't think anyone can do more than 
agree you are seeing a problem.

Eric