On Sat, Jan 13, 2018 at 8:34 AM, David Woodhouse <dw...@infradead.org> wrote: > On Sat, 2018-01-13 at 03:11 +0000, Kumar, Venkataramanan wrote: >> >> > My original patch uses "lfence". I was asked to use "pause": >> > >> > https://gcc.gnu.org/ml/gcc-patches/2018-01/msg00969.html >> >> If everyone is ok, my suggestion is to use "lfence" as the default >> loop filler for retpoline. >> >> Please confirm. > > I have the same response to this as I did to precisely the same request > in the kernel implementation: I'm OK with it but I'd like an explicit > approval from Intel, and from Paul Turner at Google who architected the > retpoline concept in the first place. > > cf. https://marc.info/?l=linux-kernel&m=151585246530355 >
There is no urgency on this. We can take another look AFTER my current patch set is approved and checked in. -- H.J.
