Ganesan R wrote:
>>>>> "Kapil" == Kapil Sethi <[EMAIL PROTECTED]> writes:
> We know that a 32 bit processor can access a max of 4GB of RAM, but two > processor systems with 8GB Ram are quite common these days. > My questions are : > 1. Are both processors able to access a full 8GB of RAM? > 1.1 if yes then how. ?
The x86 processors something called "Physical Address Extension" to address
memory beyond the 4 gig limit. Linux implementation is called
highmem.
Ganesan
I guess, what I am looking forward to, is to understand how Linux handles SMP, and that too not only on Intel but SPARC processers as well.
The Howtos on tldp are not too recent or informative about the actual theory of operations.
For example Sun servers come in configuration of 64 and above processors with 100s of Gigs of RAM.
If Linux kernel has been ported or ever be ported to such machines, what needs to be in the kernel for SMP and memory management.
Intel workaround would support max 64GB of RAM for kernel, but Intel x86 is not the only processors Linux runs on. So that limits to 16 intel processors max.
16 * 4GB = 64GB. What happens if number of CPUs has to be increased above 16 limit (can be SPARC or PPC)??
Any pointers / suggestions. ( you can suggest alternative mailing lists as well)
Thanks & Regards
Kapil
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