I am trying to replace the linux kernel in Debian7.11 with a new one of version 3.4.1(the original one is 3.2.0) for experimental environment using Parallels Desktop. I configured the new kernel with the old configuration file in /boot/ and used default values for the new features in 3.4.1.
After I finished this upgrade and reboot with the new kernel, it hung on "Unpacking initramfs". However it succeed to boot when I give it more RAM(1024MB, the original RAM is 512MB). So my question is why it can not boot with low RAM? Is it caused by some configuration options of the kernel?If so, how to configure the kernel to make it possible?
I tried to look into the configuration options of kernel but I can't get the answer. Any help would be appreciated:)