I have been seeing the problems Ethan described on
SMP i386. I was impressed by his writing and clear
analysis of the problems.
I'm very interested in seeing this fixed and would
like to work with you. I have some time to work on
this, and I'm up to speed on the code. I have done
similar work on debuggers for a couple of proprietary
UNIX systems. If there is a fix in the works, I would
like see what you're doing.
I also noticed that single stepping saves and
restores the interrupt enable flag. If you single
step over an instruction which changes this flag, you
lose its effect.
Jim Houston - Concurrent Computer