** Changed in: linux (Ubuntu Mantic)
Status: In Progress => Fix Committed
** Changed in: linux (Ubuntu Xenial)
Status: Confirmed => Won't Fix
** Changed in: linux (Ubuntu Bionic)
Status: Confirmed => Won't Fix
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https://bugs.launchpad.net/bugs/2057734
Title:
proc_sched_rt01 from ubuntu_ltp failed
Status in ubuntu-kernel-tests:
New
Status in linux package in Ubuntu:
Invalid
Status in linux source package in Xenial:
Won't Fix
Status in linux source package in Bionic:
Won't Fix
Status in linux source package in Focal:
Confirmed
Status in linux source package in Jammy:
Confirmed
Status in linux source package in Mantic:
Fix Committed
Bug description:
[Impact]
The updated LTP has added proc_sched_rt01 testcase which can't pass
since several commits are missed from kernel side.
Test log:
INFO: Test start time: Tue Mar 12 11:52:21 UTC 2024
COMMAND: /opt/ltp/bin/ltp-pan -q -e -S -a 163430 -n 163430 -f
/tmp/ltp-X3Nz2HWCQe/alltests -l /dev/null -C /dev/null -T /dev/null
LOG File: /dev/null
FAILED COMMAND File: /dev/null
TCONF COMMAND File: /dev/null
Running tests.......
tst_kconfig.c:87: TINFO: Parsing kernel config
'/lib/modules/6.5.0-27-generic/build/.config'
tst_test.c:1741: TINFO: LTP version: 20230929-406-gcbc2d0568
tst_test.c:1625: TINFO: Timeout per run is 0h 00m 30s
proc_sched_rt01.c:45: TFAIL: Expect: timeslice_ms > 0 after reset to default
proc_sched_rt01.c:51: TPASS: echo 0 > /proc/sys/kernel/sched_rt_period_us :
EINVAL (22)
proc_sched_rt01.c:53: TFAIL: echo -1 > /proc/sys/kernel/sched_rt_period_us
invalid retval 2: SUCCESS (0)
proc_sched_rt01.c:59: TPASS: echo -2 > /proc/sys/kernel/sched_rt_runtime_us :
EINVAL (22)
proc_sched_rt01.c:72: TFAIL: echo rt_period_us+1 >
/proc/sys/kernel/sched_rt_runtime_us invalid retval 1: SUCCESS (0)
HINT: You _MAY_ be missing kernel fixes:
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=c1fc6484e1fb
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=079be8fc6309
[Fix]
There are 3 relevant commits from upstream.
1. 079be8fc6309 sched/rt: Disallow writing invalid values to
sched_rt_period_us
2. c1fc6484e1fb sched/rt: sysctl_sched_rr_timeslice show default timeslice
after reset
3. c7fcb99877f9 sched/rt: Fix sysctl_sched_rr_timeslice intial value
Mantic: the 3rd is already in master-next.
Jammy: stable v5.15.150 includes the three commits.
Focal: master-next has include them after update to v5.4.270
Bionic: all the three commits are needed.
[Test case]
Run LTP update 20240312 to check the log of proc_sched_rt01.
[Regression potential]
Low risk since these content are existed in upstream for a while.
Cyril Hrubis (2):
sched/rt: sysctl_sched_rr_timeslice show default timeslice after reset
sched/rt: Disallow writing invalid values to sched_rt_period_us
kernel/sched/rt.c | 12 ++++++++----
1 file changed, 8 insertions(+), 4 deletions(-)
[Original Bug Description]
This is a new test case, issue found on M/J/F/B when testing LTP update
20240312
Test log:
INFO: Test start time: Tue Mar 12 11:52:21 UTC 2024
COMMAND: /opt/ltp/bin/ltp-pan -q -e -S -a 163430 -n 163430 -f
/tmp/ltp-X3Nz2HWCQe/alltests -l /dev/null -C /dev/null -T /dev/null
LOG File: /dev/null
FAILED COMMAND File: /dev/null
TCONF COMMAND File: /dev/null
Running tests.......
tst_kconfig.c:87: TINFO: Parsing kernel config
'/lib/modules/6.5.0-27-generic/build/.config'
tst_test.c:1741: TINFO: LTP version: 20230929-406-gcbc2d0568
tst_test.c:1625: TINFO: Timeout per run is 0h 00m 30s
proc_sched_rt01.c:45: TFAIL: Expect: timeslice_ms > 0 after reset to default
proc_sched_rt01.c:51: TPASS: echo 0 > /proc/sys/kernel/sched_rt_period_us :
EINVAL (22)
proc_sched_rt01.c:53: TFAIL: echo -1 > /proc/sys/kernel/sched_rt_period_us
invalid retval 2: SUCCESS (0)
proc_sched_rt01.c:59: TPASS: echo -2 > /proc/sys/kernel/sched_rt_runtime_us :
EINVAL (22)
proc_sched_rt01.c:72: TFAIL: echo rt_period_us+1 >
/proc/sys/kernel/sched_rt_runtime_us invalid retval 1: SUCCESS (0)
HINT: You _MAY_ be missing kernel fixes:
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=c1fc6484e1fb
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=079be8fc6309
Summary:
passed 2
failed 3
broken 0
skipped 0
warnings 0
INFO: ltp-pan reported some tests FAIL
LTP Version: 20230929-406-gcbc2d0568
INFO: Test end time: Tue Mar 12 11:52:21 UTC 2024
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