On 04/03/2013 06:11 PM, Simon Jeons wrote: > > Why we consider boot_cpu_data.x86_phys_bits instead of e820 map here? >
Because x86_phys_bits is what controls how much address space the processor has. e820 tells us how much *RAM* the machine has, or specifically, how much RAM the machine had on boot. -hpa -- H. Peter Anvin, Intel Open Source Technology Center I work for Intel. I don't speak on their behalf. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/