Hi all, In the same environment as the previous bug report (Lenovo Ideapad 3 15ITL6 laptop running Ubuntu 22.10 kinetic kudu and 6.2-rc2 vanilla Torvalds tree kernel), the next test in the ...selftest/proc/* sequence spuriously fails in assert (i1 <= i0). Please note that the compiler is the novelty GCC 12.2.0-3ubuntu1. This was previously hidden by premature hang in the `make kselftest` run due to proc-empty-vm an proc-pid-vm problems that are now fixed. root@marvin-IdeaPad-3-15ITL6:/home/marvin/linux/kernel/linux_torvalds/tools/testing/selftests/proc# ./proc-uptime-001 root@marvin-IdeaPad-3-15ITL6:/home/marvin/linux/kernel/linux_torvalds/tools/testing/selftests/proc# ./proc-uptime-001 root@marvin-IdeaPad-3-15ITL6:/home/marvin/linux/kernel/linux_torvalds/tools/testing/selftests/proc# ./proc-uptime-001 proc-uptime-001: proc-uptime-001.c:39: main: Assertion `i1 >= i0' failed. Aborted (core dumped) root@marvin-IdeaPad-3-15ITL6:/home/marvin/linux/kernel/linux_torvalds/tools/testing/selftests/proc# ./proc-uptime-001 proc-uptime-001: proc-uptime-001.c:39: main: Assertion `i1 >= i0' failed. Aborted (core dumped) root@marvin-IdeaPad-3-15ITL6:/home/marvin/linux/kernel/linux_torvalds/tools/testing/selftests/proc# ./proc-uptime-001 root@marvin-IdeaPad-3-15ITL6:/home/marvin/linux/kernel/linux_torvalds/tools/testing/selftests/proc# ./proc-uptime-001 root@marvin-IdeaPad-3-15ITL6:/home/marvin/linux/kernel/linux_torvalds/tools/testing/selftests/proc# ./proc-uptime-001 root@marvin-IdeaPad-3-15ITL6:/home/marvin/linux/kernel/linux_torvalds/tools/testing/selftests/proc# ./proc-uptime-001 root@marvin-IdeaPad-3-15ITL6:/home/marvin/linux/kernel/linux_torvalds/tools/testing/selftests/proc# ./proc-uptime-001 proc-uptime-001: proc-uptime-001.c:39: main: Assertion `i1 >= i0' failed. Aborted (core dumped) root@marvin-IdeaPad-3-15ITL6:/home/marvin/linux/kernel/linux_torvalds/tools/testing/selftests/proc# ./proc-uptime-001 root@marvin-IdeaPad-3-15ITL6:/home/marvin/linux/kernel/linux_torvalds/tools/testing/selftests/proc# ./proc-uptime-001 proc-uptime-001: proc-uptime-001.c:39: main: Assertion `i1 >= i0' failed. Aborted (core dumped) root@marvin-IdeaPad-3-15ITL6:/home/marvin/linux/kernel/linux_torvalds/tools/testing/selftests/proc# ./proc-uptime-001 root@marvin-IdeaPad-3-15ITL6:/home/marvin/linux/kernel/linux_torvalds/tools/testing/selftests/proc# ./proc-uptime-001 proc-uptime-001: proc-uptime-001.c:39: main: Assertion `i1 >= i0' failed. Aborted (core dumped) root@marvin-IdeaPad-3-15ITL6:/home/marvin/linux/kernel/linux_torvalds/tools/testing/selftests/proc# ./proc-uptime-001 root@marvin-IdeaPad-3-15ITL6:/home/marvin/linux/kernel/linux_torvalds/tools/testing/selftests/proc# ./proc-uptime-001 root@marvin-IdeaPad-3-15ITL6:/home/marvin/linux/kernel/linux_torvalds/tools/testing/selftests/proc# ./proc-uptime-001 proc-uptime-001: proc-uptime-001.c:39: main: Assertion `i1 >= i0' failed. Aborted (core dumped) root@marvin-IdeaPad-3-15ITL6:/home/marvin/linux/kernel/linux_torvalds/tools/testing/selftests/proc# ./proc-uptime-001 proc-uptime-001: proc-uptime-001.c:39: main: Assertion `i1 >= i0' failed. Aborted (core dumped) root@marvin-IdeaPad-3-15ITL6:/home/marvin/linux/kernel/linux_torvalds/tools/testing/selftests/proc# ./proc-uptime-001 proc-uptime-001: proc-uptime-001.c:39: main: Assertion `i1 >= i0' failed. Aborted (core dumped) root@marvin-IdeaPad-3-15ITL6:/home/marvin/linux/kernel/linux_torvalds/tools/testing/selftests/proc# ./proc-uptime-001 proc-uptime-001: proc-uptime-001.c:39: main: Assertion `i1 >= i0' failed. Aborted (core dumped) root@marvin-IdeaPad-3-15ITL6:/home/marvin/linux/kernel/linux_torvalds/tools/testing/selftests/proc# ./proc-uptime-001 proc-uptime-001: proc-uptime-001.c:39: main: Assertion `i1 >= i0' failed. Aborted (core dumped) root@marvin-IdeaPad-3-15ITL6:/home/marvin/linux/kernel/linux_torvalds/tools/testing/selftests/proc# ./proc-uptime-001 proc-uptime-001: proc-uptime-001.c:39: main: Assertion `i1 >= i0' failed. Aborted (core dumped) root@marvin-IdeaPad-3-15ITL6:/home/marvin/linux/kernel/linux_torvalds/tools/testing/selftests/proc# ./proc-uptime-001 It happens about half of the times the program is called. The source seems OK, I can't tell why the idle counter doesn't look monotonic to the program. Hope this helps. BTW, good news: this time I have checked independently, and this is the last test from the .../selftest/proc group that doesn't have clean exit code 0. Thanks, Mirsad -- Mirsad Goran Todorovac Sistem inženjer Grafički fakultet | Akademija likovnih umjetnosti Sveučilište u Zagrebu -- System engineer Faculty of Graphic Arts | Academy of Fine Arts University of Zagreb, Republic of Croatia The European Union
