* Steven Rostedt <rost...@goodmis.org> wrote: > > Also, this function is called a _LOT_ under certain workloads, I > > don't know how cheap a CR2 read is, but it had better be really > > cheap. > > That's a HPA question.
We read CR2 in the page fault hot path, so it's on the top of CPU architects' minds and it's reasonably optimized. A couple of cycles IIRC, but would be nice to hear actual numbers. Thanks, Ingo -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/