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Subject[RFC 0/3] memory-hotplug: handle page race between allocation and isolation
Memory hotplug has a subtle race problem so this patchset fixes the problem
(Look at [3/3] for detail and please confirm the problem before review
other patches in this series.)

[1/3] is just clean up and help for [2/3].
[2/3] keeps the migratetype information to freed page's index field
and [3/3] uses the information.
[3/3] fixes the race problem with [2/3]'s information.

After applying [2/3], migratetype argument in __free_one_page
and free_one_page is redundant so we can remove it but I decide
to not touch them because it increases code size about 50 byte.

Minchan Kim (3):
mm: use get_page_migratetype instead of page_private
mm: remain migratetype in freed page
memory-hotplug: bug fix race between isolation and allocation

include/linux/mm.h | 12 ++++++++++++
mm/page_alloc.c | 16 ++++++++++------
mm/page_isolation.c | 7 +++++--
3 files changed, 27 insertions(+), 8 deletions(-)


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