On Mon, May 02, 2016 at 07:12:52PM +0300, Kirill A. Shutemov wrote: > Any reason why mmu_notifier is not an option? No way to trigger an hardware re-tried secondary MMU fault as result of PCI DMA memory access, and expensive to do an MMU notifier invalidate if it requires waiting for the DMA to complete (but since MMU notifier is now sleepable the latter is a secondary concern). -- 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>