On Thu, Jun 01, 2017 at 06:45:32PM +0200, Dmitry Vyukov wrote: > On Thu, Jun 1, 2017 at 6:34 PM, Mark Rutland <mark.rutland@xxxxxxx> wrote: > > On Thu, Jun 01, 2017 at 07:23:37PM +0300, Andrey Ryabinin wrote: > >> We used to read several bytes of the shadow memory in advance. > >> Therefore additional shadow memory mapped to prevent crash if > >> speculative load would happen near the end of the mapped shadow memory. > >> > >> Now we don't have such speculative loads, so we no longer need to map > >> additional shadow memory. > > > > I see that patch 1 fixed up the Linux helpers for outline > > instrumentation. > > > > Just to check, is it also true that the inline instrumentation never > > performs unaligned accesses to the shadow memory? > > Inline instrumentation generally accesses only a single byte. Sorry to be a little pedantic, but does that mean we'll never access the additional shadow, or does that mean it's very unlikely that we will? I'm guessing/hoping it's the former! Thanks, Mark. -- 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>
