Hi Chris,

Your configuration is one that isn't used routinely, so you're finding 
new problems here (although I do remember other reports about problems 
with large memory configurations).

It definitely looks like you're running out of VM memory structures in 
general, and perhaps waiting endlessly for them during the synch after a 
crash.

I'll look at this, I hope to at least provide you with a patch to gather 
some statistics on VM map entries.

- Frank