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Alex Shi authored
commit "(mm/memcontrol:rewrite mem_cgroup_page_lruvec())" on mm tree use mem_cgroup_lruvec to rewrite mem_cgroup_page_lruvec, but it missed a DEBUG_VM warning as following, since we always charge a page before return from allocation. Add back this warning is helpful: VM_WARN_ON_ONCE(!memcg); Link: https://lkml.kernel.org/r/94f17bb7-ec61-5b72-3555-fabeb5a4d73b@linux.alibaba.com Signed-off-by: Alex Shi <alex.shi@linux.alibaba.com> Cc: Johannes Weiner <hannes@cmpxchg.org> Cc: Shakeel Butt <shakeelb@google.com> Cc: Roman Gushchin <guro@fb.com> Cc: Michal Hocko <mhocko@suse.com> Cc: Yafang Shao <laoar.shao@gmail.com> Cc: Alexander Duyck <alexander.h.duyck@linux.intel.com> Cc: Hui Su <sh_def@163.com> Cc: Wei Yang <richard.weiyang@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
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