4k stacks on 32-bit, 8k stacks on 64-bit

[David Kewley <kewley@xxxxxxxxxxxxxxx>]

How is xfs doing these days with 4k stacks on x86 systems, or 8k stacks on 
x86_64?

I'm running RHEL 4, with xfs enabled in a kernel directly derived from the 
RHEL 4 kernel.  I'm on x86_64, and until today, I thought I was safe 
stackwise because x86_64 keeps 8k stacks even when x86 is 4k.  But Dave Jones 
has confirmed that stack objects are twice as big on x86_64 as on x86, so I'm 
in as much danger for stack overflow as x86 is with 4k stacks.

Agreed so far?

How big is the danger, and what can I do to avoid it?

David