linux-kernel - Re: [PATCH] kunit: tool: fix --raw

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Message-ID: <CABVgOSkn1n-N50YZr7aNTgAGxkj7zkZO31B16Ji88OxM8m2WPQ@mail.gmail.com>
Date:   Fri, 30 Oct 2020 15:22:53 +0800
From:   David Gow <davidgow@...gle.com>
To:     Daniel Latypov <dlatypov@...gle.com>
Cc:     Brendan Higgins <brendanhiggins@...gle.com>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        "open list:KERNEL SELFTEST FRAMEWORK" 
        <linux-kselftest@...r.kernel.org>,
        Shuah Khan <skhan@...uxfoundation.org>
Subject: Re: [PATCH] kunit: tool: fix --raw_output to actually show output

On Fri, Oct 30, 2020 at 2:17 PM Daniel Latypov <dlatypov@...gle.com> wrote:
>
> Currently --raw_output means nothing gets shown.
> Why?
> Because `raw_output()` has a `yield` and therefore is a generator, which
> means it only executes when you ask it for a value.
>
> Given no one actually is using it as a generator (checked via the added
> type annotation), drop the yield so we actually print the output.
>
> Also strip off the trailing \n (and any other whitespace) to avoid
>   [<601d6d3a>] ? printk+0x0/0x9b
>
>   [<601e5058>] ? kernel_init+0x23/0x14b
>
>   [<600170d2>] ? new_thread_handler+0x82/0xc0
> making the output unreadable.
>
> Signed-off-by: Daniel Latypov <dlatypov@...gle.com>
> ---

The bug where --raw_output doesn't show anything is already fixed[1],
but it does still show the extra newlines.

Maybe it's worth making just the newline fix, and rolling it into the
other patch[2] handling newlines?

Cheers,
-- David

[1]: https://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest.git/commit/?h=kunit-fixes&id=3023d8ff3fc60e5d32dc1d05f99ad6ffa12b0033
[2]: https://lore.kernel.org/linux-kselftest/20201020233219.4146059-1-dlatypov@google.com/