Re: Question on the rmap VM

[Alan Cox]

>     I have a question on the rmap VM.  What is the swap requierment for it?
> I remember the previous Rik van Riel VM required twice the amount of
> swapspace as memory to run effectively as many people were complaining about
> that.  I read a while ago that the switch in 2.4.10 to the new AA VM fixed
> that issue.  Will rmap bring back that 2x requirement?  Thanks.

That issue was fixed before the VM was changed - its actually a seperate
matter of when the kernel went to the trouble of trying to dig stuff out
of swap.

If you have a 2.4.18-ac2 kernel you can also see the worst case swap 
usage requirement at the current moment in /proc/meminfo as
"Committed AS" 

Alan