Mark Kettenis <[email protected]> wrote: > I did not add the LFENCE to tc_get_timecount() itself. We probably > should, but in the past some networking folks complained about slow > timecounters affecting network performance, so I wanted confirmation > that this didn't cause problems.
I don't see how a more precise time can cause such a problem. If we are worried about any possibility of negative deltas, which might be put into unsigned variables, we should use lfence so it can't appear to go backwards..
