Hi,
it's not a Xen limitation. But here, you are showing the memory available for the Dom0, how much memory see Xen ? (xm info | grep total_memory)
Thank you Olivier :)
It appears that there was some change (that I missed) between 3 and 4 . Actually as I remember in xen 3 dom0 was always showing real physical amount of RAM . Now it appears that every domU takes ram from dom0 and I see only remains ;)
so .. summing up - xm info shows right amount of ram,
Thank You Olivier
Regards