Re: [PATCH 2/2] selftests/mm: add a uffd test for re-registering during UFFDIO_COPY

["Jose A. Perez de Azpillaga" <azpijr@gmail.com>]

On 10/31/26 10:35 AM, Mike Rapoport wrote:
> On Thu, Oct 29, 2026 at 11:11:02PM +0100, Jose A. Perez de Azpillaga wrote:
>> Re-register the destination without WP while a UFFDIO_COPY_MODE_WP copy
>> waits for its source page, then check that the copy fails with -EINVAL
>> and leaves no uffd-wp bit behind. This covers both the hugetlb and the
>> non-hugetlb UFFDIO_COPY retry.
> 
> maybe "all memory types"?

yep, that reads better.

> 
>> Signed-off-by: Jose A. Perez de Azpillaga <azpijr@gmail.com>
>> ---
>>  tools/testing/selftests/mm/uffd-unit-tests.c | 105 +++++++++++++++++++
>>  1 file changed, 105 insertions(+)
>>
>> diff --git a/tools/testing/selftests/mm/uffd-unit-tests.c b/tools/testing/selftests/mm/uffd-unit-tests.c
>> index 2a97ba1d6feb..8a7efaa7b3ac 100644
>> --- a/tools/testing/selftests/mm/uffd-unit-tests.c
>> +++ b/tools/testing/selftests/mm/uffd-unit-tests.c
>> @@ -375,6 +375,104 @@ static void uffd_wp_unpopulated_test(uffd_global_test_opts_t *gopts, uffd_test_a
>>  	uffd_test_pass();
>>  }
>>  
>> +struct wp_copy_args {
>> +	uffd_global_test_opts_t *gopts;
>> +	char *src;
>> +	__s64 copy;
> 
> maybe result?

sure, will rename it in v2.

-- 
cheers,
jose a. p-a