On Wed 26-07-17 10:33:28, Michal Hocko wrote: [...] > There is also one potential drawback, though. If somebody uses memory > hotplug for 1G (gigantic) hugetlb pages then this scheme will not work > for them obviously because each memory section will contain 2MB reserved > area.
Actually I am wrong here. It is not each section in general. I have completely forgot that we do large memblocks on x86_64 with a lot of memory and then we hotadd 2GB memblocks and the altmap will allocate from the beginign of the _memblock_ and so all the memmaps will end up in the first memory section. -- Michal Hocko SUSE Labs
