Changing ramdisk partition size...

Hi I am using OMAP-L138 and dvsdk-version 2.6.37.

I tried loading the images in ramdisk, default ramdisk size given in kernal configuration is 32768KB. I am able to load the image.

Filesystem           1K-blocks      Used        Available                       Use%           Mounted on
/dev/root                31727          30024            65                           100%                  /
none                         8                12        18014398509481980       150%                  /dev
tmpfs                    16384             24             16360                         0%                  /var/volatile
tmpfs                    62764              0               62764                        0%                 /dev/shm
tmpfs                    16384              0               16384                        0%                /media/ram

But when I changed the default ramdisk size in kernel configuration: Device drivers -> Block devices.

Still the partition size is same as given above.

Can anyone pz tell me how to change the size for /dev/root.

Thanks in advance.