linux-kernel - Re: [PATCH V2 7/9] genirq/timings: Add selftest for circular array

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Message-ID: <b9a62423-7f33-8725-3459-24cfb84043a3@linaro.org>
Date:   Fri, 24 May 2019 18:00:10 +0200
From:   Daniel Lezcano <daniel.lezcano@...aro.org>
To:     Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
Cc:     tglx@...utronix.de, linux-kernel@...r.kernel.org,
        Andrew Morton <akpm@...ux-foundation.org>,
        Masahiro Yamada <yamada.masahiro@...ionext.com>,
        Petr Mladek <pmladek@...e.com>,
        Kees Cook <keescook@...omium.org>,
        Matthew Wilcox <willy@...radead.org>,
        Joe Lawrence <joe.lawrence@...hat.com>,
        Mikulas Patocka <mpatocka@...hat.com>,
        Tetsuo Handa <penguin-kernel@...ove.sakura.ne.jp>,
        Sri Krishna chowdary <schowdary@...dia.com>,
        "Uladzislau Rezki (Sony)" <urezki@...il.com>,
        Changbin Du <changbin.du@...el.com>
Subject: Re: [PATCH V2 7/9] genirq/timings: Add selftest for circular array

On 24/05/2019 16:00, Andy Shevchenko wrote:
> On Fri, May 24, 2019 at 01:16:13PM +0200, Daniel Lezcano wrote:
>> Due to the complexity of the code and the difficulty to debug it,
>> let's add some selftests to the framework in order to spot issues or
>> regression at boot time when the runtime testing is enabled for this
>> subsystem.
>>
>> This tests the circular buffer at the limits and validates:
>>  - the encoding / decoding of the values
>>  - the macro to browse the irq timings circular buffer
>>  - the function to push data in the circular buffer
> 
> Can it use kselftest infrastructure?

I don't think it is possible because it is 100% deep-internal test, no
cooperation with userspace.


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