On 10/02/2012 02:32 PM, T Makphaibulchoke wrote: > Changing devmem_is_allowed so that on an EFI machine, access to physical > address below 1 MB is allowed only to physical pages that are valid in > the EFI memory map. This prevents the possibility of an MCE due to > accessing an invalid physical address. What? That sounds like exactly the opposite of normal /dev/mem behavior... we allow access to non-memory resources (which really could do anything if misused), but not memory. You seem like you're flipping it on its head. -hpa -- 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>