vm_lowmem event handler for dirhash

[David Malone]

On Wed, May 27, 2009 at 09:57:31AM -0700, Julian Elischer wrote:
> I was initially impressed by the numbers until I saw the scales..
> a difference between 475.5 and 474 is not that significant, but if 
> your graph scale is from 473 to 477, it looks at first glace very 
> impressive.

I think we felt the real gains here would be the ability to set the
dirhash memory limits to a much larger value without having to worry
about it chewing all your memory. The results basically confirm that
we haven't introduced any serious regressions ;-)

	David.