On Tue, Nov 28, 2017 at 12:00 PM, Michal Hocko <[email protected]> wrote: > On Tue 28-11-17 08:19:41, Shakeel Butt wrote: >> The commit d6810d730022 ("memcg, THP, swap: make mem_cgroup_swapout() >> support THP") changed mem_cgroup_swapout() to support transparent huge >> page (THP). However the patch missed one location which should be >> changed for correctly handling THPs. The resulting bug will cause the >> memory cgroups whose THPs were swapped out to become zombies on >> deletion. > > Very well spotted! Have you seen this triggering or you found it by the > code inspection? >
By code inspection.
