linux-kernel - Re: [PATCH v2 net-next 6/6] selftests: forwarding: add dynamic FDB test

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Message-ID: <20230331085840.5wfxsuj6u7hge2uj@skbuf>
Date:   Fri, 31 Mar 2023 11:58:40 +0300
From:   Vladimir Oltean <olteanv@...il.com>
To:     Hans Schultz <netdev@...io-technology.com>
Cc:     Ido Schimmel <idosch@...dia.com>, davem@...emloft.net,
        kuba@...nel.org, netdev@...r.kernel.org,
        Florian Fainelli <f.fainelli@...il.com>,
        Andrew Lunn <andrew@...n.ch>,
        Eric Dumazet <edumazet@...gle.com>,
        Paolo Abeni <pabeni@...hat.com>,
        Kurt Kanzenbach <kurt@...utronix.de>,
        Hauke Mehrtens <hauke@...ke-m.de>,
        Woojung Huh <woojung.huh@...rochip.com>,
        "maintainer:MICROCHIP KSZ SERIES ETHERNET SWITCH DRIVER" 
        <UNGLinuxDriver@...rochip.com>, Sean Wang <sean.wang@...iatek.com>,
        Landen Chao <Landen.Chao@...iatek.com>,
        DENG Qingfang <dqfext@...il.com>,
        Matthias Brugger <matthias.bgg@...il.com>,
        AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...labora.com>,
        Claudiu Manoil <claudiu.manoil@....com>,
        Alexandre Belloni <alexandre.belloni@...tlin.com>,
        Clément Léger <clement.leger@...tlin.com>,
        Jiri Pirko <jiri@...nulli.us>,
        Ivan Vecera <ivecera@...hat.com>,
        Roopa Prabhu <roopa@...dia.com>,
        Nikolay Aleksandrov <razor@...ckwall.org>,
        Shuah Khan <shuah@...nel.org>,
        Christian Marangi <ansuelsmth@...il.com>,
        open list <linux-kernel@...r.kernel.org>,
        "moderated list:ARM/Mediatek SoC support" 
        <linux-arm-kernel@...ts.infradead.org>,
        "moderated list:ARM/Mediatek SoC support" 
        <linux-mediatek@...ts.infradead.org>,
        "open list:RENESAS RZ/N1 A5PSW SWITCH DRIVER" 
        <linux-renesas-soc@...r.kernel.org>,
        "moderated list:ETHERNET BRIDGE" <bridge@...ts.linux-foundation.org>,
        "open list:KERNEL SELFTEST FRAMEWORK" 
        <linux-kselftest@...r.kernel.org>
Subject: Re: [PATCH v2 net-next 6/6] selftests: forwarding: add dynamic FDB
 test

On Fri, Mar 31, 2023 at 09:43:34AM +0200, Hans Schultz wrote:
> On Thu, Mar 30, 2023 at 22:27, Vladimir Oltean <olteanv@...il.com> wrote:
> > This is how I always run them, and it worked fine with both Debian
> > (where it's easy to add missing packages to the rootfs) or with a more
> > embedded-oriented Buildroot.
> 
> I am not entirely clear of your idea. You need somehow to boot into a
> system with the patched net-next kernel

You have to do that anyway for any kind of kernel work, no?

> or you have a virtual machine boot into a virtual OS. I guess it is
> the last option you refer to using Debian?

You could do that too, but you don't have to. Debian, like many other
Linux distributions, supports a wide variety of CPU architectures; it
can be run on embedded systems just as well as on desktop PCs or VMs.
I didn't say you have to use Debian, though, I just said I ran the
selftests on a Debian-based rootfs and that it was easy to prepare the
environment there. The Debian rootfs and the selftests were deployed to
the target board with the DSA switch on it, in case that wasn't clear.