Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18;
MIME-Version: 1.0
References: <20210714231506.886386-1-dlatypov@google.com>
In-Reply-To: <20210714231506.886386-1-dlatypov@google.com>
From:   David Gow <davidgow@google.com>
Date:   Thu, 15 Jul 2021 14:13:57 +0800
Message-ID: <CABVgOS=b6+KXp8LP5tAoaFev6yDX4gjrD1i9vBv58Y7JkO_E1A@mail.gmail.com>
Subject: Re: [PATCH v2] kunit: tool: add --kernel_args to allow setting module params
To:     Daniel Latypov <dlatypov@google.com>
Cc:     Brendan Higgins <brendanhiggins@google.com>,
        Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
        KUnit Development <kunit-dev@googlegroups.com>,
        "open list:KERNEL SELFTEST FRAMEWORK" 
        <linux-kselftest@vger.kernel.org>,
        Shuah Khan <skhan@linuxfoundation.org>
Content-Type: text/plain; charset="UTF-8"
Precedence: bulk

On Thu, Jul 15, 2021 at 7:15 AM Daniel Latypov <dlatypov@google.com> wrote:
>
> kunit.py currently does not make it possible for users to specify module
> parameters (/kernel arguments more generally) unless one directly tweaks
> the kunit.py code itself.
>
> This hasn't mattered much so far, but this would make it easier to port
> existing tests that expose module parameters over to KUnit and/or let
> current KUnit tests take advantage of them.
>
> Tested using an kunit internal parameter:
> $ ./tools/testing/kunit/kunit.py run --kunitconfig=lib/kunit \
>     --kernel_args=kunit.filter_glob=kunit_status
> ...
> Testing complete. 2 tests run. 0 failed. 0 crashed. 0 skipped.
>
> Signed-off-by: Daniel Latypov <dlatypov@google.com>

Thanks! This is probably overdue: while I still think we want to avoid
this being necessary for most uses, it definitely was a gap in
kunit_tool functionality.

I tested this and it worked fine, but did cause several of the
kunit_tool_tests to fail, largely due to there being changes to the
arguments of run_kernel(). Those should just require the associated
tests to be updated.

-- David