On Fri, 2024-01-19 at 14:56 +0100, Stefan Liebler wrote: > I've reduced the test (see attachement) and now have only one process > with three threads. This tests fails on my setup as well: main: start 3 threads. #0: started: fct=1 #1: started: fct=1 #2: started: fct=1 #2: mutex_timedlock failed with 22 (round=28772) But, after this patch: https://lore.kernel.org/all/20240116130810.ji1YCxpg@xxxxxxxxxxxxx/ ...the attached test hangs. However, the glibc test that was failing for me "nptl/tst-robustpi8" passes with the linked patch applied. So I think that patch fixes the issue I hit. What is passing supposed to look like on the attached test?