Re: [PATCH 0/4] selftests/mm: skip several tests when thp is not available

[Mike Rapoport <rppt@kernel.org>]

On Fri, Mar 13, 2026 at 08:26:02AM +0800, Chunyu Hu wrote:
> On Thu, Mar 12, 2026 at 04:03:59PM +0200, Mike Rapoport wrote:
> > On Thu, Mar 12, 2026 at 07:40:23PM +0800, Chunyu Hu wrote:
> > > There are several tests requires transprarent hugepages, when run on thp
> > > disabled kernel such as realtime kernel, there will be false positve.
> > 
> > I presume that when THP tests run on kernels with THP disabled they fail
> > and it would be a false negative rather than false positive.
> 
> This is an interesting point. I'm not naitive speaker. I just learned
> from AI. It really matters what we define as 'postive'. I presume 'postive'
> is we run selftest and got a failure report, that's postive, not thinking
> as it's thp disabled kernel and a 'pass' is postive.

I think that a passing test is "positive" and a failing test is "negative".
So a test that fails because of misconfiguration is a false negative to me.
 
> I'll add statement about 'postive' in v2 like "a test failure is
> defiend as postive"
> 
> > 
> > > Mark those tests as skip when thp is not available.
> > > 
> > > Chunye Hu (4):
> > >   selftests/mm/guard-regions: skip collapse test when thp not enabled
> > >   selftests/mm: soft-dirty: skip two tests when thp not available
> > >   selftests/mm: split_huge_page_test: skip the test when thp not
> > >     available
> > >   selftests/mm: transhuge_stress: skip the test when thp not available
> > > 
> > >  tools/testing/selftests/mm/guard-regions.c        | 4 ++++
> > >  tools/testing/selftests/mm/soft-dirty.c           | 4 +++-
> > >  tools/testing/selftests/mm/split_huge_page_test.c | 9 +++++++--
> > >  tools/testing/selftests/mm/transhuge-stress.c     | 4 ++++
> > >  4 files changed, 18 insertions(+), 3 deletions(-)
> > > 
> > > 
> > > base-commit: 80234b5ab240f52fa45d201e899e207b9265ef91
> > > -- 
> > > 2.53.0
> > > 
> > 
> > -- 
> > Sincerely yours,
> > Mike.
> > 
> 

-- 
Sincerely yours,
Mike.