I made more advanded tutorial howto enable the unused mtd partition as swap. With this method you can freely still use the mass-storage mode.

Disclaimer: you can brick your device if you don't have opensh and don't follow instructions carefully.

RM696-21-3_PR_001:~# devel-su
RM696-21-3_PR_001:~# opensh
RM696-21-3_PR_001:~# accli -I |grep tcb-sign
aegis-enabler::tcb-sign <--- If grep doesn't find this line then you have to STOP and not go further.
RM696-21-3_PR_001:~# free
total used free shared buffers
Mem: 1008648 803080 205568 0 33580
-/+ buffers: 769500 239148
Swap: 262136 54012 208124
RM696-21-3_PR_001:/# cp /etc/init/enable-swap.conf /tmp/enable-swap.conf
RM696-21-3_PR_001:/# vi /tmp/enable-swap.conf
# make editions on 2 lines that is mentioned in my earlier patch that I posted here. http://pastebin.com/raw.php?i=8rS81vUX
RM696-21-3_PR_001:/# cp /tmp/enable-swap.conf /etc/init/enable-swap.conf
RM696-21-3_PR_001:/# export A=`sha1sum /tmp/enable-swap.conf |cut -b1-40`;
RM696-21-3_PR_001:/# perl -pi -w -e 's#40 (.*) A(.*)enable-swap#40 $ENV{A} A$2enable-swap#smg' /var/lib/aegis/refhashlist
RM696-21-3_PR_001:/# accli -c tcb-sign -F /var/lib/aegis/refhashlist -i /var/lib/aegis/refhashlist
RM696-21-3_PR_001:/# /usr/sbin/validator-init; aegis-loader;echo 1 > /sys/kernel/security/validator/flush
RM696-21-3_PR_001:~# reboot
# wait system to reboot and login again:
RM696-21-3_PR_001:~# free
total used free shared buffers
Mem: 1008648 478264 530384 0 24040
-/+ buffers: 454224 554424
Swap: 444664 0 444664


As you can see after reboot you have about 530MB free ram which is 256MB more than before, and swap file is now the 450MB mtd partiotion which was previously unused by the device.

I'm not going to make comparision if onenand mtd partition is faster than mass storage flash partition. If pages are cached in either flash its going to be a bit slower than ramz.

Performance benefit of this is that you have 256MB more ram to play with, and if your not running over 15 apps simultaneously then most likely this increased amount of ram will make your device faster, since its more unlikely that system needs to page your background apps in swap