linux-kernel - Re: [PATCH 2/2] kcsan: test: Add a .kunitconfig to run KCSAN tests

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Date:   Thu, 14 Jul 2022 16:47:55 -0700
From:   Daniel Latypov <dlatypov@...gle.com>
To:     Marco Elver <elver@...gle.com>
Cc:     David Gow <davidgow@...gle.com>,
        Brendan Higgins <brendanhiggins@...gle.com>,
        Shuah Khan <skhan@...uxfoundation.org>,
        Dmitry Vyukov <dvyukov@...gle.com>,
        KUnit Development <kunit-dev@...glegroups.com>,
        kasan-dev <kasan-dev@...glegroups.com>,
        "open list:KERNEL SELFTEST FRAMEWORK" 
        <linux-kselftest@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 2/2] kcsan: test: Add a .kunitconfig to run KCSAN tests

On Thu, Jul 14, 2022 at 4:45 PM Daniel Latypov <dlatypov@...gle.com> wrote:
> Ack.
> So concretely, so then a final result like this?
>
> $ cat kernel/kcsan/.kunitconfig
> # Note that the KCSAN tests need to run on an SMP setup.
> # Under kunit_tool, this can be done by using the x86_64-smp
> # qemu-based architecture:

Oops, this bit would need to be updated to something like:

# Under kunit_tool, this can be done by using --qemu_args:

> # ./tools/testing/kunit/kunit.py run --kunitconfig=kernel/kcsan
> --arch=x86_64 --qemu_args='-smp 8'
>
> CONFIG_KUNIT=y
>
> CONFIG_DEBUG_KERNEL=y
>
> CONFIG_KCSAN=y
> CONFIG_KCSAN_KUNIT_TEST=y
>
> # Need some level of concurrency to test a concurrency sanitizer.
> CONFIG_SMP=y
>
> # This prevents the test from timing out on many setups. Feel free to remove
> # (or alter) this, in conjunction with setting a different test timeout with,
> # for example, the --timeout kunit_tool option.
> CONFIG_KCSAN_REPORT_ONCE_IN_MS=100