| Message ID | 1651753148-1464-2-git-send-email-yangtiezhu@loongson.cn (mailing list archive) |
|---|---|
| State | Superseded |
| Headers | show |
| Series | Modify some code about kprobe | expand |
On Thu, 5 May 2022 20:19:07 +0800 Tiezhu Yang <yangtiezhu@loongson.cn> wrote: > It may lead to kernel panic when execute the following testcase on mips: > > # ./ftracetest test.d/kprobe/multiple_kprobes.tc > > A preliminary analysis shows that the issue is related with > > echo 1 > events/kprobes/enable > > after add the 256 probe points. > > In order to find the root cause, I want to verify which probe point has > problem, so it is necessary to save kprobe_events to test log. > > With this patch, we can get the 256 probe points in the test log through > the following command: > > # ./ftracetest test.d/kprobe/multiple_kprobes.tc -vvv -k This looks good to me. :) Acked-by: Masami Hiramatsu <mhiramat@kernel.org> Thank you, > > Signed-off-by: Tiezhu Yang <yangtiezhu@loongson.cn> > --- > tools/testing/selftests/ftrace/test.d/kprobe/multiple_kprobes.tc | 2 ++ > 1 file changed, 2 insertions(+) > > diff --git a/tools/testing/selftests/ftrace/test.d/kprobe/multiple_kprobes.tc b/tools/testing/selftests/ftrace/test.d/kprobe/multiple_kprobes.tc > index 312d237..be754f5 100644 > --- a/tools/testing/selftests/ftrace/test.d/kprobe/multiple_kprobes.tc > +++ b/tools/testing/selftests/ftrace/test.d/kprobe/multiple_kprobes.tc > @@ -25,6 +25,8 @@ if [ $L -ne 256 ]; then > exit_fail > fi > > +cat kprobe_events >> $testlog > + > echo 1 > events/kprobes/enable > echo 0 > events/kprobes/enable > echo > kprobe_events > -- > 2.1.0 >
diff --git a/tools/testing/selftests/ftrace/test.d/kprobe/multiple_kprobes.tc b/tools/testing/selftests/ftrace/test.d/kprobe/multiple_kprobes.tc index 312d237..be754f5 100644 --- a/tools/testing/selftests/ftrace/test.d/kprobe/multiple_kprobes.tc +++ b/tools/testing/selftests/ftrace/test.d/kprobe/multiple_kprobes.tc @@ -25,6 +25,8 @@ if [ $L -ne 256 ]; then exit_fail fi +cat kprobe_events >> $testlog + echo 1 > events/kprobes/enable echo 0 > events/kprobes/enable echo > kprobe_events
It may lead to kernel panic when execute the following testcase on mips: # ./ftracetest test.d/kprobe/multiple_kprobes.tc A preliminary analysis shows that the issue is related with echo 1 > events/kprobes/enable after add the 256 probe points. In order to find the root cause, I want to verify which probe point has problem, so it is necessary to save kprobe_events to test log. With this patch, we can get the 256 probe points in the test log through the following command: # ./ftracetest test.d/kprobe/multiple_kprobes.tc -vvv -k Signed-off-by: Tiezhu Yang <yangtiezhu@loongson.cn> --- tools/testing/selftests/ftrace/test.d/kprobe/multiple_kprobes.tc | 2 ++ 1 file changed, 2 insertions(+)