On Wed, Mar 5, 2014 at 3:35 PM, Dave Chinner <david@xxxxxxxxxxxxx> wrote:
> On Wed, Mar 05, 2014 at 03:08:16PM -0800, Austin Schuh wrote:
>> I'm running a config_preempt_rt patched version of the 3.10.11 kernel,
>> and I'm seeing a couple lockups and crashes which I think are related
>> to XFS.
> I think they ar emore likely related to RT issues....
That very well may be true.
> Your usb device has disconnected and gone down the device
> removal/invalidate partition route. and it's trying to flush the
> device, which is stuck on IO completion which is stuck waiting for
> the device error handling to error them out.
> So, this is a block device problem error handling problem caused by
> device unplug getting stuck because it's decided to ask the
> filesystem to complete operations that can't be completed until the
> device error handling progress far enough to error out the IOs that
> the filesystem is waiting for completion on.
> Dave Chinner
I unplugged the USB device _after_ the rest of the system started
locking up to see if that might unstick things.