Re: [PATCH v3 10/13] selftests/mm: skip uffd-stress test when nr_pages_per_cpu is zero

[David Hildenbrand (Arm)]

On 3/27/26 08:16, Sayali Patil wrote:
> uffd-stress currently fails when the computed nr_pages_per_cpu
> evaluates to zero:
> 
> nr_pages_per_cpu = bytes / page_size / nr_parallel
> 
> This can occur on systems with large hugepage sizes (e.g. 1GB) and a
> high number of CPUs, where the total allocated memory is sufficient
> overall but not enough to provide at least one page per cpu.
> 
> In such cases, the failure is due to insufficient test resources
> rather than incorrect kernel behaviour. Update the test
> to treat this condition as a test skip instead of reporting an error.
> 
> Fixes: db0f1c138f18 ("selftests/mm: print some details when uffd-stress gets bad params")
> Acked-by: Zi Yan <ziy@xxxxxxxxxx>
> Tested-by: Venkat Rao Bagalkote <venkat88@xxxxxxxxxxxxx>
> Signed-off-by: Sayali Patil <sayalip@xxxxxxxxxxxxx>

Acked-by: David Hildenbrand (Arm) <david@xxxxxxxxxx>

-- 
Cheers,

David