On Sat, 23 Sep 2006, John Klos wrote:

> netbsd-4 tree, built with gcc 4: regarding the issue with sleeping jobs
> such as top or vmstat not getting past the first screen, I've discovered
> that this only happens when I'm not using AGA video mode (my default boot
> flags don't have the "A" because I have a scandoubler and I prefer the
> faster text).

  This is (also) very weird.  The only thing -A should do is to prefer
using the scan-doubled AGA mode if AGA is available, and should't affect
anything else.  I check a -current kernel I've been using for debugging
other pmap issues, and I don't see any problems when I don't use -A (I've
gotten into the habit of using -A even when booting test kernels most of
the time).

  My "working" 4.0 kernel also didn't exhibit this behaviour (but still
had the 68060 bug in the pmap, so was a little hard to work with - I'm
building a new one with the pulled-up patch and will see how that goes).
I think the kernel I test was built with gcc4, but it was somewhat old and
I can't be sure it was actually built with gcc4).