IRQ storm on xhci0

[Eitan Adler]

Hi all,

I am noticing consistently high IRQ rates on xhci0

example from vmstat -i right now:
irq259: xhci0                    2222153       1876

and this is not the highest I've seen.

My understanding is that a rate of 1876/s is insane for USB devices.
Any suggestions of what I can do to debug?

Things I've tried:
- disabling MSI interrupts
- disabling MSI-X interrupts
- powering off all usb devices using usbconfig
- unplugging all USB devices

One thing of note:
My mobo has a broken USB connector resulting in one of the two front
USB-3 ports not working. I'm guessing this is related but I'd like
some confirmation and/or a way to bypass the issue in software.

-- 
Eitan Adler