In message 33621.202.62.67.130.1118214038.squirrel@202.62.67.130 you wrote:
I am struggling with RAM disk Space.
And what has this to do with U-Boot?
Here "initrd(linux file system)" includes all my application code along with linux file system.
Using a ramdisk for the root file system is nearly always a sub-optimal solution. It's OK for quick testing, but not a good idea for production systems.
Currently our RAMDISK size is 4MB and it is working fine. We wanted to increase RAMDISK size to 16MB.
Just do it. All this is documented, and actually even part of the FAQ list: http://www.denx.de/twiki/bin/view/DULG/HowToIncreaseSizeOfRamdisk
We tried by changing the RAMDISK size to 8MB, without any modifications in Kernel, which worked fine. But when we increased the RAM DISK to more than 8MB(12or16MB), the kernel is giving "Kernel panic" error.
Sorry, but this is completely off topic on this list.
Best regards,
Wolfgang Denk