I'm running Ubuntu 11.10, which came with kernel version
3.0.0-14. I downloaded and built a kernel from the
3.1.0 branch. After installing the new kernel, I see that my
/boot/initrd.img-3.1.0 file is HUGE. It's 114MB, while my
/boot/initrd.img-3.0.0-14-generic is about 13MB. I want to get rid of the bloat, which is clearly unnecessary.
When building the new kernel, I copied my
.config in my build directory, as to keep the configuration of my original kernel. I ran
make oldconfig, selected the defaults for all the new options, and then built the kernel.
Looking at the file sizes within each of the initrd cpio archives, I see that all of my .ko modules are larger in size in the 3.1.0 ramdisk, than the 3.0.0-14. I assumed there was an unnecessary debug flag checked in my config file, but I don't see anything different that was not already enabled in the 3.0.0-14 config file.
/boot/config-3.0.0-14-generic is here:
/boot/config-3.0.1 is here:
Can anyone explain where all the unnecessary bloat is coming from?