On Wed, Jul 07, 2010 at 11:56:01AM +0300, Kirill A. Shutemov wrote: > But it seems that the problem is more global. Potentially, any of > pmd_none() check may produce false results. I don't see an easy way to fix > it. It isn't. We normally guarantee that we always fill on both L1 entries. The only exception is for the mappings specified via create_mapping() which is used for the static platform mappings. > Does Linux VM still expect one PTE table per page? Yes, and as far as I can see probably always will. Hence why we need to put two L1 entries in one page and lie to the kernel about the sizes of the hardware entries. -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxxx For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>