On Sun, Feb 26, 2017 at 12:09:08PM +0800, Baoquan He wrote: > Am I right on understanding it?
That's exactly what I mean: KERNEL_IMAGE_SIZE is 512M by default but we're not hard-constrained to it - we're hard-constrained to a 1G limit as this is the 1G which is covered by level2_kernel_pgt. And in thinking about this more, I know I suggested making the KERNEL_IMAGE_SIZE by default 1G in order to simplify things. But you're adding another KERNEL_MAPPING_SIZE which confuses things more. And I fail to see why we absolutely need it. So we suggest kernel image size should be 512M but then we still will be using a whole 1G mapping for it anyway and a whole page of PMDs at level2_kernel_pgt. So why even bother? Just make it 1G and don't introduce anything new. -- Regards/Gruss, Boris. SUSE Linux GmbH, GF: Felix Imendörffer, Jane Smithard, Graham Norton, HRB 21284 (AG Nürnberg) --