>>>>> "Greg" == Greg Oster <oster@cs.usask.ca> writes:

Maybe my (quite non-specific) panic's with raidframe raid5 systems
belong to this problem:

  http://mail-index.netbsd.org/current-users/2002/09/15/0000.html

  http://mail-index.netbsd.org/current-users/2003/02/28/0009.html

Playing with NMBCLUSTERS (up to 16384) didn't help really help.
Retrospective starting use of raid5's swap on these machines would be
a good correlation for the timepoint of the panic/hangs.

Anything I could try/test for narrowing this problem?

Markus.