On Mon, 31 Aug 2020 at 09:24, <[email protected]> wrote: > > On Sun, Aug 30, 2020 at 11:54:19AM -0700, Linus Torvalds wrote: > > On Sun, Aug 30, 2020 at 11:04 AM Thomas Gleixner <[email protected]> wrote: > > > > > > - Make is_idle_task() __always_inline to prevent the compiler from > > > putting > > > it out of line into the wrong section because it's used inside noinstr > > > sections. > > > > What completely broken compiler uninlined that single-instruction function? > > > > I've obviously pulled this, but it sounds like there should be a > > compiler bug-report for this insane behavior. > > > > Or is Marco building the kernel without optimizations or something > > like that? That has not been a supported model, for various good > > reasons.. > > I think that was Clang with KCSAN on, KCSAN obviously makes this > function a little bigger with the instrumentation for the load(s). But > yes...
I wasn't quite sure myself if it was Clang or GCC, so I re-tested with the linked config (which says GCC), and it reproduces on both.
