On Thu, 19 Jun 2014, Paul E. McKenney wrote: > On Thu, Jun 19, 2014 at 03:31:56PM -0500, Christoph Lameter wrote: > > On Thu, 19 Jun 2014, Paul E. McKenney wrote: > > > > > That is a separate issue, but unnecessary calls to cond_resched() > > > should of course be removed -- no argument there. > > > > It looks like we are fighting higher latencies by adding calls in most of > > the critical sections which will in turn increase the latencies that we > > are trying to reduce. > > That is on battle in a larger war. Another battle is to keep big systems > from choking and dying. We need to win both battles, though I understand > that you are focused primarily on latency reduction. I don't get that > luxury because RCU is used across the board.
At least reduce the increased latencies to a processor or put it somewhere outside of the regular execution paths. Sprinkling this throughout the kernel via a inline function that did not generate code in the non debug situation before is not that nice. -- 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/
