On Thu, Apr 02, 2020 at 10:07:07PM +0200, Thomas Gleixner wrote: If we're doing wish lists, I have one more ;-) > TBH, the more I learn about this, the more I tend to just give up on > this whole split lock stuff in its current form and wait until HW folks > provide something which is actually usable: > > - Per thread > - Properly distinguishable from a regular #AC via error code - is an actual alignment check. That is, disallow all unaligned LOCK prefixed ops, not just those that happen to straddle a cacheline.