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

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Date:   Fri, 15 Jul 2022 14:49:33 +0800
From:   David Gow <davidgow@...gle.com>
To:     Daniel Latypov <dlatypov@...gle.com>
Cc:     Marco Elver <elver@...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 Fri, Jul 15, 2022 at 7:48 AM Daniel Latypov <dlatypov@...gle.com> wrote:
>
> 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


Thanks everyone. I've sent out a v2 with just this patch here:
https://lore.kernel.org/linux-kselftest/20220715064052.2673958-1-davidgow@google.com/

I expect we'll take it in via the KUnit branch, as it's most useful
with the --qemu_args option.

Cheers,
-- David

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