On 09/21/2016 09:27 AM, Michal Hocko wrote: > That was not my point. I wasn't very clear probably. Offlining can fail > which shouldn't be really surprising. There might be a kernel allocation > in the particular block which cannot be migrated so failures are to be > expected. I just do not see how offlining in the middle of a gigantic > page is any different from having any other unmovable allocation in a > block. That being said, why don't we simply refuse to offline a block > which is in the middle of a gigantic page.
Don't we want to minimize the things that can cause an offline to fail? The code to fix it here doesn't seem too bad.
