On Tue, Jan 23, 2018 at 11:14:36PM +0000, Woodhouse, David wrote: > On Tue, 2018-01-23 at 14:49 -0800, Andi Kleen wrote: > > > Not sure. Maybe to start, the answer might be to allow it to be set for > > > the ultra-paranoid, but in general don't enable it by default. Having it > > > enabled would be an alternative to someone deciding to disable SMT, since > > > that would have even more of a performance impact. > > > > I agree. A reasonable strategy would be to only enable it for > > processes that have dumpable disabled. This should be already set for > > high value processes like GPG, and allows others to opt-in if > > they need to. > > That seems to make sense, and I think was the solution we were > approaching for IBPB on context switch too, right? Right. -Andi
