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.)
[1/4] is just clean up and help for [2/4].
[2/4] keeps the migratetype information to freed page's index field
and [3/4] uses the information.
[3/4] fixes the race problem with [2/4]'s information.
[4/4] enhance memory-hotremove operation success ratio
After applying [2/4], 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.
This patchset is based on mmotm-2012-09-06-16-46
Minchan Kim (4):
use get_page_migratetype instead of page_private
mm: remain migratetype in freed page
memory-hotplug: bug fix race between isolation and allocation
memory-hotplug: fix pages missed by race rather than failing
include/linux/mm.h | 12 ++++++++++++
include/linux/page-isolation.h | 4 ++++
mm/page_alloc.c | 19 ++++++++++++-------
mm/page_isolation.c | 18 ++++++++++++++++--
4 files changed, 44 insertions(+), 9 deletions(-)
--
1.7.9.5
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