[Crash-utility] Crash physical search on live session not recommended :-)

[Dave Anderson]

----- Original Message -----
> While testing my search patch, I kicked off an unconstrained physical
> search on a live session and hung the machine so thoroughly that it
> required a visit to the machine room to physically unplug it to get the
> remote console back up. Coincidence? Or should physical address search
> on a live session be constrained somehow for safety?
> 
> Bob Montgomery

Maybe so -- I had no problem with any of the systems I've tested it on.

Is it always reproducible on that system?

And does that system use /dev/mem or /dev/crash?

It would be interesting to know if a particular physical address caused it,
or if there are physical pages that are read that are *not* read when an 
unconstrained kernel virtual search is done?

Dave