You can get 32MB L2 cache on an Intel i9 13000k and maximum size of a compiled Linux Kernel appears to be around 8MB. I am not going to pretend I have any idea

You can get 32MB L2 cache on an Intel i9 13000k and maximum size of a compiled Linux Kernel appears to be around 8MB. I am not going to pretend I have any idea because I have just googled these numbers but it seems to me that an amount of cache could be reserved for the kernel without too much of a hit to applications on what are currently high end machines.