On Tue 18-02-20 15:24:48, kkabe@xxxxxxxxxxx wrote: [...] > Tried out the above patch. > It seems to be working; no panic, total memory has increased and > the hot-added memory is added as HIGHMEM. I was about to post a patch to mark hotplug broken on 32b but it seems you do care about this setup. Could you describe your usecase please? -- Michal Hocko SUSE Labs