Alex Thorlton reported segementation faults when NUMA balancing is enabled on large machines. There is no obvious explanation from the console what the problem but similar problems have been observed by Rik van Riel and myself if migration was aggressive enough. Alex, this series is against 3.13-rc2, a verification that the fix addresses your problem would be appreciated. This series starts with a range of patches aimed at addressing the segmentation fault problem while offsetting some of the cost to avoid badly regressing performance in -stable. Those that are cc'd to stable (patches 1-12) should be merged ASAP. The rest of the series is relatively minor stuff that fell out during the course of development that is ok to wait for the next merge window but should help with the continued development of NUMA balancing. arch/sparc/include/asm/pgtable_64.h | 4 +- arch/x86/include/asm/pgtable.h | 11 +++- arch/x86/mm/gup.c | 13 +++++ include/asm-generic/pgtable.h | 2 +- include/linux/migrate.h | 9 ++++ include/linux/mm_types.h | 44 +++++++++++++++ include/linux/mmzone.h | 5 +- include/trace/events/migrate.h | 26 +++++++++ include/trace/events/sched.h | 93 ++++++++++++++++++++++++++++++++ kernel/fork.c | 1 + kernel/sched/core.c | 2 + kernel/sched/fair.c | 15 +++++- mm/huge_memory.c | 45 ++++++++++++---- mm/migrate.c | 103 ++++++++++++++++++++++++++++-------- mm/mprotect.c | 15 ++++-- mm/pgtable-generic.c | 8 ++- 16 files changed, 348 insertions(+), 48 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>
