On Fri, Aug 11, 2017 at 12:51:12PM -0400, Vince Weaver wrote: > On Fri, 11 Aug 2017, Mark Rutland wrote: > > Just to check, how does x86 behave on each of those kernel releases? > > > > Many things have changed since v4.4. > > I'm fairly sure this test (well, the equivelent code in > tests/record_sample/record_mmap that I based the test on) has been passing > on all of my x86 test machines since ~3.10 or so, or else I would noticed.
Ok. > If I can get a custom kernel to boot on one of my machines I can start > digging in and see if I can find where the EINVAL comes from. >From a quick scan, I can't spot anything obvious that would affect the arm64 perf mmap behaviour, that has changed since v4.9. > This isn't some key thing that needs to be fixed, I was just curious about > the behavior difference between x86 and ARM. Sure; likewise I'm curious. Thanks, Mark.
