[LTP] [PATCH v4] mmap22.c: Test for new MAP_DROPPABLE flag for mmap

[Li Wang]

On Wed, May 14, 2025 at 4:52 PM Jan Stancek via ltp <ltp@lists.linux.it> wrote:
>
> On Tue, May 13, 2025 at 5:44 AM Wei Gao <wegao@suse.com> wrote:
> >
> > On Mon, May 12, 2025 at 10:43:55AM +0200, Jan Stancek wrote:
> > > Is anyone else seeing this test failing on recent 6.15-rc5 kernels?
> > >
> > > ==== mmap22 ====
> > > command: mmap22
> > > tst_tmpdir.c:316: TINFO: Using /tmp/LTP_mmazCULNN as tmpdir (tmpfs filesystem)
> > > tst_test.c:1938: TINFO: LTP version: 20250130-253-g4a0e3a8fa
> > > tst_test.c:1942: TINFO: Tested kernel:
> > > 6.15.0-0.rc5.250509g9c69f8884904.47.eln148.x86_64 #1 SMP
> > > PREEMPT_DYNAMIC Fri May  9 15:17:31 UTC 2025 x86_64
> > > tst_kconfig.c:88: TINFO: Parsing kernel config
> > > '/lib/modules/6.15.0-0.rc5.250509g9c69f8884904.47.eln148.x86_64/build/.config'
> > > tst_test.c:1758: TINFO: Overall timeout per run is 0h 05m 54s
> > > mmap22.c:55: TFAIL: MAP_DROPPABLE did not drop memory within the timeout period.
> > >
> >
> > I have tested rc5/6 and both give pass result.
>
> I do see it fail almost daily on multiple arches (VMs and baremetal),
> maybe some difference in our config.

Have you tried the original self-test (without using Cgroup)?
If it still fails, consider it a kernel issue.

-- 
Regards,
Li Wang