RFC: Improvements to superpages support on ARM

[Ruslan Bukin]

On Mon, Feb 10, 2014 at 02:13:20AM +0100, Zbigniew Bodek wrote:
> Hello.
> 
> I would like to submit some patches for superpages support.
> 
> Please check out below:
> http://people.freebsd.org/~zbb/arm/pmap/superpages/02.2014/
> 
> I will appreciate if someone could test the patches (all patches need
> to be applied).
> All comments and remarks are also welcome.
> 
> You can stress the memory system by using for example forkbomb from ports:
> benchmarks/forkbomb/
> 
> forkbomb -M -l 512 --runasroot --quit
> will allocate and touch 512 MB of memory
> 
> Please remember to set loader variable:
> vm.pmap.sp_enabled=1
> or sp_enabled to positive value in pmap-v6.c
> 

works fine on freescale VF50

% sysctl vm.pmap.sp_enabled
vm.pmap.sp_enabled: 1

% forkbomb -M -l 32 --runasroot --quit
Safety alarm at 300 sec. enabled.
Actions: alloc 32 MB (step 4096 kB) and touch it.
Forkbomb 1.4 started.
%