linux-kernel - Re: [PATCH] selftests/ftrace: Correctly enable event in instance-event.tc

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Message-ID: <20230906090252.36219543@gandalf.local.home>
Date:   Wed, 6 Sep 2023 09:02:52 -0400
From:   Steven Rostedt <rostedt@...dmis.org>
To:     Zheng Yejian <zhengyejian1@...wei.com>
Cc:     "Masami Hiramatsu (Google)" <mhiramat@...nel.org>,
        Ajay Kaher <akaher@...are.com>, <shuah@...nel.org>,
        <linux-kernel@...r.kernel.org>,
        <linux-trace-kernel@...r.kernel.org>,
        <linux-kselftest@...r.kernel.org>,
        Shuah Khan <skhan@...uxfoundation.org>,
        Ye Weihua <yeweihua4@...wei.com>
Subject: Re: [PATCH] selftests/ftrace: Correctly enable event in
 instance-event.tc

On Wed, 6 Sep 2023 08:56:21 -0400
Steven Rostedt <rostedt@...dmis.org> wrote:

> On Wed, 6 Sep 2023 19:57:24 +0800
> Zheng Yejian <zhengyejian1@...wei.com> wrote:
> 
> > BTW, I do reproduce with following testcase fix, then just run: 
> > ./ftracetest test.d/instances/instance-event.tc
> > diff --git 
> > a/tools/testing/selftests/ftrace/test.d/instances/instance-event.tc 
> > b/tools/testing/selftests/ftrace/test.d/instances/instance-event.tc
> > index 0eb47fbb3f44..42422e425107 100644
> > --- a/tools/testing/selftests/ftrace/test.d/instances/instance-event.tc
> > +++ b/tools/testing/selftests/ftrace/test.d/instances/instance-event.tc
> > @@ -39,7 +39,7 @@ instance_read() {
> > 
> >   instance_set() {
> >           while :; do
> > -                echo 1 > foo/events/sched/sched_switch
> > +                echo 1 > foo/events/sched/sched_switch/enable
> >           done 2> /dev/null
> >   }  
> 
> Ah thanks. I didn't have that on my test box :-p
> 
> Although I'm still having issues reproducing it. Do you have anything
> special on your kernel command line?
> 

Also, which branch are you testing? What's the sha of the code you are testing?

-- Steve