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View Full Version : New CPU, new kernel?



jonnycat
25th October 2014, 12:43 AM
I'm switching out my CPU (Core2Duo to Xeon), and I'm wondering if I am going to need to rebuild/reinstall my kernel as a result of this. The two chips are very similar in architecture, but they use different microcode.

Should I plan on changing out the kernel? If so, is there an easy way to remove the latest kernel and reinstall it through yum?

sidebrnz
25th October 2014, 01:16 AM
I don't think that the microcode is going to be an issue, as the kernel isn't written in microcode. About the only time you'd want to change your kernel is if you're running a 32-bit system, install enough RAM to take you over 4GB and don't want to do a complete reinstall of a 64-bit system. In that case, your best bet would be to install a PAE kernel, boot to it and then remove all non-PAE kernels. (This is what I did after my last RAM upgrade; if/when I need to reinstall from scratch, I'll go 64-bit, but for now, it's just Too Much Work.)

jonnycat
25th October 2014, 04:30 PM
Okay thanks, I didn't know if microcode was incorporated into the kernel, good to know!