On Fri, Jul 29, 2016 at 02:16:07PM -0400, Chris Metcalf wrote: > On 7/11/2016 8:19 AM, Mark Rutland wrote: > >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. > > I don't see this commit pushed up as part of what's in 4.8 so far. Any chance > it's going to go in later in the merge window? I'm just hoping to trim down > the > task-isolation series by being able to drop this patch from its next > iteration... :-)
I'll queue it up for 4.9, once I've had a closer look. Will
