Hi Arnd, in linux-next as of today 16 strace self tests fail on s390. I could bisect this to b136972b063b ("y2038: socket: Add compat_sys_recvmmsg_time64"). The following tests fail: mmsg.gen.test clock.gen.test regex.gen.test sched.gen.test trace_fstatfs.gen.test trace_personality_regex_64.gen.test trace_fstat.gen.test trace_personality_32.gen.test trace_question.gen.test trace_personality_regex_32.gen.test trace_personality_64.gen.test trace_stat.gen.test trace_statfs.gen.test trace_lstat.gen.test trace_stat_like.gen.test trace_statfs_like.gen.test If needed the s390 kernel config can be re-created with make ARCH=s390 performance_defconfig strace self tests can be reproduced with > git clone https://gitlab.com/strace/strace.git > cd strace > ./bootstrap > ./configure > make > cd tests > make check