https://bugzilla.novell.com/show_bug.cgi?id=878306
https://bugzilla.novell.com/show_bug.cgi?id=878306#c3
--- Comment #3 from Michal Hocko 2014-05-16 14:02:09 CEST ---
OK, found it.
284f39afeaa4 (mm: memcg: push !mm handling out to page cache charge function)
was supposed to handle early boot
http://marc.info/?l=linux-mm&m=139463617808941&w=2
so then we could remove !mm check by
03583f1a631c (memcg: remove unnecessary !mm check from
try_get_mem_cgroup_from_mm())
It seems that the firs patch didn't cover all case. The one reported here is
about loopback device on top of tmpfs.
Patch in progress.
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