On Fri, Dec 4, 2015 at 3:38 PM, Dave Hansen <dave@xxxxxxxx> wrote: > On 12/04/2015 03:31 PM, Andy Lutomirski wrote: >> On Thu, Dec 3, 2015 at 5:14 PM, Dave Hansen <dave@xxxxxxxx> wrote: >>> Memory Protection Keys for User pages is a CPU feature which will >>> first appear on Skylake Servers, but will also be supported on >>> future non-server parts. It provides a mechanism for enforcing >>> page-based protections, but without requiring modification of the >>> page tables when an application changes protection domains. See >>> the Documentation/ patch for more details. >> >> What, if anything, happened to the signal handling parts? > > Patches 12 and 13 contain most of it: > > x86, pkeys: fill in pkey field in siginfo > signals, pkeys: notify userspace about protection key faults > > I decided to just not try to preserve the pkey_get/set() semantics > across entering and returning from signals, fwiw. Hmm. I'll see if I can find some time this weekend to play with that bit. Maybe I can test by faking it and tweaking MPX instead of PKRU. --Andy -- 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>