On 10/18/2014 06:28 PM, Dave Hansen wrote:
> Currently it is an all or nothing thing, but for a future change we might want to just > tag the guest memory instead of the complete user address space. I think it's a bad idea to reserve a flag for potential future use. If you_need_ it in the future, let's have the discussion then. For now, I think it should probably just be stored in the mm somewhere.
I agree with Dave (I thought I disagreed, but I changed my mind while writing down my thoughts). Just define mm_forbids_zeropage in arch/s390/include/asm, and make it return mm->context.use_skey---with a comment explaining how this is only for processes that use KVM, and then only for guests that use storage keys.
Paolo (who was just taught what storage keys really are) -- 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>