I didn't see this failure in T-4.4 4.4.0-186-lowlatency #216~14.04.1-Ubuntu
-- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1886890 Title: sched_rr_get_interval01 from ubuntu_ltp_syscalls failed on 4.4 Status in ubuntu-kernel-tests: New Status in linux package in Ubuntu: Incomplete Status in linux source package in Xenial: Incomplete Bug description: == SRU Justification == A new regression test case "sched_rr_get_interval01" for commit 975e155ed873 ("sched/rt: Show the 'sched_rr_timeslice' SCHED_RR timeslice tuning knob in milliseconds"). Has been added to the LTP syscalls test suite. On Xenial 4.4.0-186.216, this test is failing with: startup='Wed Jul 8 10:36:58 2020' tst_test.c:1247: INFO: Timeout per run is 0h 05m 00s sched_rr_get_interval01.c:43: INFO: Testing variant: vDSO or syscall with libc spec sched_rr_get_interval01.c:60: PASS: sched_rr_get_interval() passed sched_rr_get_interval01.c:68: PASS: Time quantum 0s 100000000ns sched_rr_get_interval01.c:75: FAIL: /proc/sys/kernel/sched_rr_timeslice_ms != 100 got 25 tst_test.c:1247: INFO: Timeout per run is 0h 05m 00s sched_rr_get_interval01.c:43: INFO: Testing variant: syscall with old kernel spec sched_rr_get_interval01.c:60: PASS: sched_rr_get_interval() passed sched_rr_get_interval01.c:68: PASS: Time quantum 0s 100000000ns sched_rr_get_interval01.c:75: FAIL: /proc/sys/kernel/sched_rr_timeslice_ms != 100 got 25 HINT: You _MAY_ be missing kernel fixes, see: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=975e155ed873 Summary: passed 4 failed 2 skipped 0 warnings 0 tag=sched_rr_get_interval01 stime=1594204618 dur=0 exit=exited stat=1 core=no cu=0 cs=0 == Fixes == 975e155ed873 ("sched/rt: Show the 'sched_rr_timeslice' SCHED_RR timeslice tuning knob in milliseconds") This patch can be cherry-picked in to the affected Xenial kernel. It's already been applied in newer kernels. == Test == Test kernel can be found here: https://people.canonical.com/~phlin/kernel/lp-1886890-sched_rr_get_interval01/ With the patch applied, this test will pass without any issue. And it can be simply tested with: # echo 100 > /proc/sys/kernel/sched_rr_timeslice_ms # cat /proc/sys/kernel/sched_rr_timeslice_ms 100 (was 25 before the patch) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu-kernel-tests/+bug/1886890/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
