Re: [PATCH] selftests/mm: mrelease_test: fix retry limit

["Lorenzo Stoakes (ARM)" <ljs@kernel.org>]

On Thu, Oct 01, 2026 at 11:47:01AM +0200, David Hildenbrand (Arm) wrote:
> On 10/1/26 08:00, Aveline Noir wrote:
> > mrelease_test doubles the child allocation when process_mrelease()
> > returns ESRCH.
> >
> > When size is already MAX_SIZE_MB, the current <= check still allows
> > another retry, causing the allocation to grow from 1024 MB to 2048 MB.
> >
> > Use < instead of <= so the largest allocation attempted remains
> > MAX_SIZE_MB.
> >
> > LLM used in discovering bug. Changes were made and reviewed manually.
> >
> > Fixes: 33776141b812 ("selftests: vm: add process_mrelease tests")
> > Assisted-by: LLM
> > Signed-off-by: Aveline Noir <jm5905938@gmail.com>
> > ---
> >  tools/testing/selftests/mm/mrelease_test.c | 2 +-
> >  1 file changed, 1 insertion(+), 1 deletion(-)
> >
> > diff --git a/tools/testing/selftests/mm/mrelease_test.c
> > b/tools/testing/selftests/mm/mrelease_test.c
> > index 64e8d00ae944..a5124c9e9f43 100644
> > --- a/tools/testing/selftests/mm/mrelease_test.c
> > +++ b/tools/testing/selftests/mm/mrelease_test.c
> > @@ -157,7 +157,7 @@ int main(void)
> >  		 * Retry until we succeed or reach MAX_SIZE_MB.
> >  		 */
> >  		if (errno == ESRCH) {
> > -			retry = (size <= MAX_SIZE_MB);
> > +			retry = (size < MAX_SIZE_MB);
> >  		} else {
> >  			waitpid(pid, NULL, 0);
> >  			ksft_exit_fail_msg("process_mrelease: %s\n", strerror(errno));
>
> Makes sense
>
> Acked-by: David Hildenbrand (Arm) <david@kernel.org>

Acked-by: Lorenzo Stoakes (ARM) <ljs@kernel.org>

>
> --
> Cheers,
>
> David

--
Cheers, Lorenzo