[pve-devel] some finding avout minimum static memory when pc-dimm exists

Dietmar Maurer dietmar at proxmox.com
Sun Jan 25 19:20:12 CET 2015


> (With my last patch, I fix the static memory to 512MB(or 1GB) if you want,
> so all upper memory is dimm devices.
> 
> Note that 4TB is the physical limit for 64bits system. (and for qemu)

A real 64bit system is not limited to 4TB, because 2^64 is 18446744073709551616.

But I guess current processors do not use 64 address lines ;-)

> we can reach 4TB with a minimum dimm size of 512MB.
> 
> my $dimm_size = 512;
> for (my $j = 0; $j < 8; $j++) {
>     for (my $i = 0; $i < 32; $i++) {
> 
> That's seem ok for me. (I personnaly don't need to hotplug under 512MB )

looks good to me.



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