On Wed, Feb 08, 2017 at 08:25:16AM -0800, Andy Lutomirski wrote: > On Tue, Feb 7, 2017 at 1:06 PM, Paul E. McKenney > <paulmck@xxxxxxxxxxxxxxxxxx> wrote: > > On Tue, Feb 07, 2017 at 10:56:59AM -0800, Andy Lutomirski wrote: > >> Quite a few people have expressed interest in enabling PCID on (x86) > >> Linux. Here's the code: > >> > >> https://git.kernel.org/cgit/linux/kernel/git/luto/linux.git/log/?h=x86/pcid > >> > >> The main hold-up is that the code needs to be reviewed very carefully. > >> It's quite subtle. In particular, "x86/mm: Try to preserve old TLB > >> entries using PCID" ought to be looked at carefully to make sure the > >> locking is right, but there are plenty of other ways this this could > >> all break. > >> > >> Anyone want to take a look or maybe scare up some other reviewers? > >> (Kees, you seemed *really* excited about getting this in.) > > > > Cool! > > > > So I can drop 61ec4c556b0d "rcu: Maintain special bits at bottom of > > ->dynticks counter", correct? > > Nope. That's a different optimization. If you consider that patch > ready, want to email me, the dynticks folks, and linux-mm as a > reminder? Hmmm... Good point. I never have gotten any review feedback, and I don't have a specific test for it. Let me take another look at it. There is probably something still broken. Thanx, Paul -- 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>
