lockup during rdump

[Randy Bush]

>> i found no way to get its attention to get a dump, and am open to
>> suggestions.
> Break to DDB on the serial console, and use 'ps', 'trace', 'show
> alllocks' (with witness enabled), 'show lockedvnods' etc.

i was unable to break to console.  old discussion, console
concentrator is a cisco 2511 which i access via ssh, and
never did sort out how to get a break on that path.

hoping someone else sees this problem who is in a better
position to trap/dump.

but thanks.

randy