On Tue, Feb 11, 2014 at 04:04:55PM +0530, Aneesh Kumar K.V wrote: > From: "Aneesh Kumar K.V" <aneesh.kumar@xxxxxxxxxxxxxxxxxx> > > Archs like ppc64 doesn't do tlb flush in set_pte/pmd functions. ppc64 also doesn't implement > flush_tlb_range. ppc64 require the tlb flushing to be batched within ptl locks. The reason > to do that is to ensure that the hash page table is in sync with linux page table. > We track the hpte index in linux pte and if we clear them without flushing hash and drop the > ptl lock, we can have another cpu update the pte and can end up with double hash. We also want > to keep set_pte_at simpler by not requiring them to do hash flush for performance reason. > Hence cannot use them while updating _PAGE_NUMA bit. Add new functions for marking pte/pmd numa > > Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@xxxxxxxxxxxxxxxxxx> Acked-by: Mel Gorman <mgorman@xxxxxxx> -- Mel Gorman SUSE Labs -- 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>