On Wed, 2026-05-27 at 17:59 +0800, Qiang Ma wrote: > When executing the command > "make -C tools/testing/selftests TARGETS=livepatch run_tests", > the following error message was reported. > > TEST: livepatch interaction with ftrace_enabled sysctl ... not ok > ... > livepatch: sysctlo > : setting key "kernel.ftrace_enabled": Device or resource busy > livepatch: sysctl: setting key "kernel.ftrace_enabled": 设备或资源忙 > ... > ERROR: livepatch kselftest(s) failed > not ok 5 selftests: livepatch: test-ftrace.sh # exit=1 > > To fix it, set LC_ALL=C.
Would you mind adding more context here? Can you point exactly why is this failing inside test-ftrace.sh script? Have you double checked if you had any previous loaded livepatches why trying to disable/enable livepatching? I'll test in my environment, but I'm pretty sure that it used to work not so long ago. > > Signed-off-by: Qiang Ma <[email protected]> > --- > tools/testing/selftests/livepatch/functions.sh | 2 ++ > 1 file changed, 2 insertions(+) > > diff --git a/tools/testing/selftests/livepatch/functions.sh > b/tools/testing/selftests/livepatch/functions.sh > index 8ec0cb64ad94..ecf27c1120f1 100644 > --- a/tools/testing/selftests/livepatch/functions.sh > +++ b/tools/testing/selftests/livepatch/functions.sh > @@ -4,6 +4,8 @@ > > # Shell functions for the rest of the scripts. > > +export LC_ALL=C > + > MAX_RETRIES=600 > RETRY_INTERVAL=".1" # seconds > SYSFS_KERNEL_DIR="/sys/kernel"
