On Mon, Jul 11, 2016 at 12:42:37PM +0100, Will Deacon wrote: > On Fri, Jul 08, 2016 at 04:49:01PM +0100, Will Deacon wrote: > > On Fri, Jul 08, 2016 at 11:43:50AM -0400, Chris Metcalf wrote: > > > I am hopeful that this patch [1] can be picked up for the 4.8 merge window > > > in the arm64 tree. As I mentioned in my last patch series that included > > > this patch [2], I'm hopeful that this version addresses the performance > > > issues that were seen with Mark's original patch. This version tests the > > > TIF flags prior to calling out to the loop in C code. > > > > I still need to get round to measuring that again. This might also > > conflict with a late fix I just sent for 4.7. > > FWIW, I've failed to measure any performance overhead from this change, > so it certainly looks better thsn Mark's original patch from that angle.
FWIW, likewise, with perf bench sched atop of v4.7-rc6. Mark.
