Re: USB xhci crash under load on 5.14-rc3

On Wed, Aug 04, 2021 at 10:00:46AM +0200, Greg KH wrote:

Hi,

I was doing some filesystem backups from one USB device to another one
this weekend and kept running into the problem of the xhci controller
shutting down after an hour or so of high volume traffic.

I finally captured the problem in the kernel log as this would also take
out my keyboard, making it hard to recover from :)

The log is below for when the problem happens, and then the devices are
disconnected from the bus (ignore the filesystem errors, those are
expected when i/o is in flight and we disconnect a device.

Any hint as to what the IO_PAGE_FAULT error messages are?

I'll go back to 5.13.y now and see if I can reproduce it there or not,
as my backups are not yet done...

5.13.7 seemed to work, but locked up overnight when running this same
workload, so it is a bit worse.  Let me split the USB devices across PCI
devices and see if that helps...