Messages in this thread | | | Date | Fri, 11 Aug 2017 18:09:21 +0100 | From | Mark Rutland <> | Subject | Re: perf: multiple mmap of fd behavior on x86/ARM |
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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.
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