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
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