Re: suspend/resume versus OpenZFS on USB

On 04/09/2020 09:01, Hans Petter Selasky wrote:
> On 2020-09-04 01:42, Graham Perrin wrote:
>> This week for the first time I toyed with OpenZFS on a USB device: a 
>> mobile hard disk drive connected to the dock of an HP EliteBook 8570p.
>>
>> A light test, with the pool imported but not writing to the dataset 
>> at suspend time.
>>
>> At resume time (22:31), the device was still physically connected but 
>> the pool suffered an I/O failure (and the keyboard and trackball on 
>> USB were unusable).
…
> We need output from "procstat -akk" to see where ZFS/USB is hanging.
>
> --HPS

For test purposes I reproduced the behaviour with a different device, a 
USB flash drive (connected to the same dock).

Attached:

2020-09-05 09:27:55 procstat -akk.txt

– output from procstat -akk

2020-09-05 09:17:59 suspend 09:26:49 resume.txt

– the output in context.

Thank you

Graham