On Fri, 11 Aug 2017, Mark Rutland wrote: > > 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.
well I finally got a current git 64-bit kernel booted on the pi3. Challenge: USB known to be broken currently, so no keyboard or ethernet. Extra challenge: had the RX/TX lines switched on the serial connector. Bonus challenge: the bcm2837 dts file doesn't enable armv8 PMU I got through all of that, only to find: $ uname -a Linux pi3-git 4.13.0-rc4-00152-g2627393 #2 SMP PREEMPT Fri Aug 11 13:58:42 EDT 2017 aarch64 GNU/Linux $ ./mmap_multiple Trying to mmap same perf_event fd multiple times... PASSED So maybe the issue was fixed between 4.9 and current? Vince
