linux-kernel - Re: [PATCH] selftests/ftrace: Have pid filter test use instance flag

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Message-ID: <20200130121352.466e3300@gandalf.local.home>
Date:   Thu, 30 Jan 2020 12:13:52 -0500
From:   Steven Rostedt <rostedt@...dmis.org>
To:     Shuah Khan <shuahkhan@...il.com>
Cc:     LKML <linux-kernel@...r.kernel.org>,
        Masami Hiramatsu <mhiramat@...nel.org>,
        Namhyung Kim <namhyung@...nel.org>
Subject: Re: [PATCH] selftests/ftrace: Have pid filter test use instance
 flag


Shuah,

Can you take this through your tree?

Thanks!

-- Steve


On Thu, 30 Jan 2020 12:12:05 -0500
Steven Rostedt <rostedt@...dmis.org> wrote:

> From: "Steven Rostedt (VMware)" <rostedt@...dmis.org>
> 
> While running the ftracetests, the pid filter test failed because the
> instance "foo" existed, and it was using it to rerun the test under a
> instance named foo. The collision caused the test to fail as the mkdir
> failed as the name already existed.
> 
> As of commit b5b77be812de7 ("selftests: ftrace: Allow some tests to be run
> in a tracing instance") all a selftest needs to do to be tested in an
> instance is to set the "instance" flag. There's no reason a selftest needs
> to create an instance to run its test in an instance directly.
> 
> Remove the open coded testing in an instance for the pid filter test and
> have it set the "instance" flag instead.
> 
> Signed-off-by: Steven Rostedt (VMware) <rostedt@...dmis.org>
> ---
>  .../selftests/ftrace/test.d/ftrace/func-filter-pid.tc     | 8 +-------
>  1 file changed, 1 insertion(+), 7 deletions(-)
> 
> diff --git a/tools/testing/selftests/ftrace/test.d/ftrace/func-filter-pid.tc b/tools/testing/selftests/ftrace/test.d/ftrace/func-filter-pid.tc
> index 64cfcc75e3c1..f2ee1e889e13 100644
> --- a/tools/testing/selftests/ftrace/test.d/ftrace/func-filter-pid.tc
> +++ b/tools/testing/selftests/ftrace/test.d/ftrace/func-filter-pid.tc
> @@ -1,6 +1,7 @@
>  #!/bin/sh
>  # SPDX-License-Identifier: GPL-2.0
>  # description: ftrace - function pid filters
> +# flags: instance
>  
>  # Make sure that function pid matching filter works.
>  # Also test it on an instance directory
> @@ -96,13 +97,6 @@ do_test() {
>  }
>  
>  do_test
> -
> -mkdir instances/foo
> -cd instances/foo
> -do_test
> -cd ../../
> -rmdir instances/foo
> -
>  do_reset
>  
>  exit 0