On Tue, Aug 01, 2017 at 06:42:00PM +0200, Peter Zijlstra wrote: > On Tue, Aug 01, 2017 at 09:14:12AM -0700, Paul E. McKenney wrote: > > So if ARM really needs the litmus test with smp_rmb() to be allowed, > > we need to adjust the Linux-kernel memory model appropriately. Which > > means that one of us needs to reach out to the usual suspects. Would > > you like to do that, or would you like me to? > > I'm really sad ARM8.1 LSE breaks this stuff.. It is rather counter > intuitive (then again, we _are_ talking barriers).
No argument. Then again, when we said that the Linux kernel memory model would have a non-trivial rate of change, we weren't joking. Will, is this the official description? http://infocenter.arm.com/help/index.jsp?topic=/com.arm.doc.ddi0557a.b/index.html If so, is B6.1 what we should be looking at? Thanx, Paul
