On Mon, 2016-03-10 at 06:40:29 UTC, Anton Blanchard wrote: > From: Anton Blanchard <an...@samba.org> > > During context switch, switch_mm() sets our current CPU in mm_cpumask. > We can avoid this atomic sequence in most cases by checking before > setting the bit. > > Testing on a POWER8 using our context switch microbenchmark: > > tools/testing/selftests/powerpc/benchmarks/context_switch \ > --process --no-fp --no-altivec --no-vector > > Performance improves 2%. > > Signed-off-by: Anton Blanchard <an...@samba.org> > Acked-by: Balbir Singh <bsinghar...@gmail.com>
Applied to powerpc next, thanks. https://git.kernel.org/powerpc/c/bb85fb5803270c52863b983596c2a0 cheers
