Alex Thorlton reported segementation faults when NUMA balancing is enabled on large machines. There is no obvious explanation from the console what the problem is so this series is based on code review. The series is against 3.12. In the event it addresses the problem the patches will need to be forward-ported and retested. The series is not against the latest mainline as changes to PTE scan rates may mask the bug. arch/x86/mm/gup.c | 13 ++++ include/linux/hugetlb.h | 10 ++-- include/linux/migrate.h | 27 ++++++++- kernel/sched/fair.c | 16 ++++- mm/huge_memory.c | 58 ++++++++++++++---- mm/hugetlb.c | 51 ++++++---------- mm/memory.c | 93 ++--------------------------- mm/mempolicy.c | 2 + mm/migrate.c | 155 ++++++++++++++++++++++++++++++++++++++++++++---- mm/mprotect.c | 50 ++++------------ mm/pgtable-generic.c | 3 + mm/swap.c | 143 +++++++++++++++++++++++++------------------- 12 files changed, 371 insertions(+), 250 deletions(-) -- 1.8.4 -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>