On Tue, Apr 08, 2014 at 05:46:52PM +0100, Mel Gorman wrote: > Someone will ask why automatic NUMA balancing hints do not use "real" > PROT_NONE but as it would need VMA information to do that on all > architectures it would mean that VMA-fixups would be required when marking > PTEs for NUMA hinting faults so would be expensive.
Like this: https://lkml.org/lkml/2012/11/13/431 That used the generic PROT_NONE infrastructure and compared, on fault, the page protection bits against the vma->vm_page_prot bits? So the objection to that approach was the vma-> dereference in pte_numa() ? -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
