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? --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>
