Messages in this thread | | | Date | Tue, 20 Aug 2019 13:52:52 -0700 | From | "Paul E. McKenney" <> | Subject | Re: [PATCH 1/1] Fix: trace sched switch start/stop racy updates |
| |
On Tue, Aug 20, 2019 at 10:39:39PM +0200, Peter Zijlstra wrote: > 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 :-)
C'mon, Peter! Where is your sense of self-destruction??? ;-)
But yes, if nothing else there is a Toolchains MC [1]. Which happens to have a topic entitled "Potential impact/benefit/detriment of recently developed GCC optimizations on the kernel", now that you mention it. Looking forward to seeing you in Lisbon!
Thanx, Paul
[1] https://linuxplumbersconf.org/event/4/sessions/45/#20190909
| |