Re: [PATCH 1/1] Fix: trace sched switch start/stop racy updates

From: Peter Zijlstra
Date: Tue Aug 20 2019 - 16:40:08 EST

On Tue, Aug 20, 2019 at 01:31:35PM -0700, Paul E. McKenney wrote:
> On Tue, Aug 20, 2019 at 04:01:16PM +0200, Peter Zijlstra wrote:

> > We really should get the compiler folks to give us a
> > -fno-pointer-provenance. Waiting on the standards committee to get their
> > act together seems unlikely, esp. given that some people actually seem
> > to _want_ this nonsense :/
> The reason that they want it is to enable some significant optimizations
> in numerical code on the one hand and in heavily templated C++ code on
> the other. Neither of which has much bearing on kernel code.
> Interested in coming to the next C standards committee meeting in October
> to help me push for this? ;-)

How about we try and get some compiler folks together at plumbers and
bribe them with beer? Once we have our compiler knob, we happy :-)