Re: uvnfp2 / biowait

[Patrick Welche <prlw1%welche.eu@localhost>]

On Fri, Dec 20, 2024 at 02:57:44PM +0000, Patrick Welche wrote:
> Posting just because I remember recently wondering what a process was up
> to and seeing it was in uvnfp2.
> 
> I was just doing an rsync from umass0/msdos to ld0/zfs when rsync
> stalled. It was in uvnfp2, now it is in biowait.
> 
> crash> show ps
> ...
> 1585   1585 3   1   1000000   ffffa2a57cece400              rsync biowait
> ...
> crash> show tstiles
>  1585  1585            rsync                0       cv ffffa2a58d080210
> 
> Presumably I missed anything interesting. kill -KILL 1585 insufficient
> need to reboot... (Dec 19 -current/amd64)

Slightly more clue: umass0/msdos was an SD card in a USB SD card
reader.  The SD card sd0 kept going offline and returning which
presumably resulted in the above.  dd'ing its constents locally
and using the file as a vnd worked.

A working 10T real drive when plugged into a USB external enclosure
also keeps going on and offline. Works fine when connected directly
via SATA.

That changes the picture somewhat...


Cheers,

Patrick