4KSTACKS et al...

[Dave Jones]

On Fri, Aug 05, 2005 at 09:22:55AM +0800, Ian Kent wrote:
 > I also find it hard to understand why it is such a problem having a larger 
 > stack. As you point out, as software evolves it ultimately becomes more 
 > complex. If the developers design needs it and the software is reliable 
 > and efficient (aka performs well) then why not.
 > 
 > A quick caclulation.
 > 
 > 2000*4k is about 8M in say 1G at least.
 > 
 > Not a large percentage overhead I think.

Now try finding 2000 _contiguous_ pairs of pages after the machine
has been up for a while, under load.  Memory fragmentation makes
this a really nasty problem, and the VM eats its own head after
repeatedly scanning every page in the system.

		Dave