mhocko@xxxxxxxxxx sed in <20200218084700.GD21113@xxxxxxxxxxxxxx> >> 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? My usecase is testing out the kernel on Hyper-V before loading it on real i686 machine. Hyper-V machine is faster to skim out other bugs. So memory hot-add is not a must requirement for me, but having hot-add may be handy to see the application memory requirement. (as in the anaconda test revealed) If we're disabling it, we have to announce it somewhere; where is appropriate? `modinfo hv_balloon`'s "hot_add" description? -- kabe
