linux-kernel - Re: [PATCH v2 7/8] selftests: Remove KSFT_TAP

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Date:   Thu, 25 Apr 2019 11:06:05 -0600
From:   shuah <shuah@...nel.org>
To:     Kees Cook <keescook@...omium.org>
Cc:     Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Darren Hart <dvhart@...radead.org>,
        Christian Brauner <christian@...uner.io>,
        Tycho Andersen <tycho@...ho.ws>,
        Serge Hallyn <serge@...lyn.com>,
        "open list:KERNEL SELFTEST FRAMEWORK" 
        <linux-kselftest@...r.kernel.org>,
        LKML <linux-kernel@...r.kernel.org>, shuah <shuah@...nel.org>
Subject: Re: [PATCH v2 7/8] selftests: Remove KSFT_TAP_LEVEL

On 4/25/19 10:56 AM, Kees Cook wrote:
> On Thu, Apr 25, 2019 at 9:36 AM shuah <shuah@...nel.org> wrote:
>>
>> On 4/24/19 5:12 PM, Kees Cook wrote:
>>> Since sub-testing can now be detected by indentation level, this removes
>>> KSFT_TAP_LEVEL so that subtests report their TAP header for later parsing.
>>
>> Does this take into ksft_print_header() getenv logic to avoid printing
>> TAP headers from tests when they fork? e.g timers tests do that a lot.
> 
> I didn't change the ksft_print_header() code, in case you want it back
> in the future. But nothing sets that variable any more in my series:
> 

Right. I want to see the impact of not setting this. I added this for
two reasons, one is to prevent nesting which goes away with your
refactor. I know there is another reason which I can't recall.


> $ git grep KSFT_TAP_LEVEL
> tools/testing/selftests/kselftest.h:    if (!(getenv("KSFT_TAP_LEVEL")))
> 
> I don't see the timers tests using print_header() at all, actually...
> 
> $ cd tools/testing/kselftest/timers
> $ git grep print_header | wc -l
> 0
> 

I don't see it in there either. I must be thinking about another test.

btw I like the changes. I just want to make sure it gets some road
testing first. :)

thanks,
-- Shuah