On Sat, Jul 22, 2023 at 08:47:16AM -0700, Guenter Roeck wrote:

Hi,

On Sun, Apr 30, 2023 at 10:18:09AM -0700, Yury Norov wrote:

quoted

Test for_each_numa_cpus() output to ensure that:
 - all CPUs are picked from NUMA nodes with non-decreasing distances to the
   original node; 
 - only online CPUs are enumerated;
 - the macro enumerates each online CPUs only once;
 - enumeration order is consistent with cpumask_local_spread().

The latter is an implementation-defined behavior. If cpumask_local_spread()
or for_each_numa_cpu() will get changed in future, the subtest may need
to be adjusted or even removed, as appropriate.

It's useful now because some architectures don't implement numa_distance(),
and generic implementation only distinguishes local and remote nodes, which
doesn't allow to test the for_each_numa_cpu() properly.

This patch results in a crash when testing sparc64 images with qemu.

Thanks Guenter for reporting. I'll remove the series until fixing the
issue.

Thanks,
Yury