[parisc-linux] sshd triggers Protection id trap

[John David Anglin]

> After another attempt I could eventually log in again and thought this
> "wasn't much" (so to speak). Then after a few more hours I realized
> the loadavg on the machine was abnormally high. A sshd process was
> taking 100% of CPU time. I tried to kill it (with SIGTERM first,
> twice), and as it wouldn't terminate I issued a SIGKILL, which had the
> very nice effect of taking down the whole machine, spitting endless
> regdumps on the console (see the last dump of the following log).
> 
> The console log / short story is here:
> http://www.pateam.org/archive/dumps/sshd-code27

This appears to be the same problem as I'm having killing hung
java processes.  When I went in this morning to reboot the machine,
it was looping endlessly at the same spot.  It had some hung java
processes and I had tried to do a "shutdown -r +0".  I'm seeing
this with 32bit UP kernel, so I don't think using a UP kernel is
a workaround.

I'd look at the dumps for the protection id traps.  Possibly,
there might be a clue there as to what went wrong.

Dave
-- 
J. David Anglin                                  dave.anglin at nrc-cnrc.gc.ca
National Research Council of Canada              (613) 990-0752 (FAX: 952-6602)