netdev - Re: [PATCH v3 net-next 9/9] selftests: net: dsa: add a stress test for unlocked FDB operations

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Message-ID: <b0c589f4-35c6-c743-7ebd-f23ff546fc1e@gmail.com>
Date:   Fri, 22 Oct 2021 10:40:02 -0700
From:   Florian Fainelli <f.fainelli@...il.com>
To:     Vladimir Oltean <vladimir.oltean@....com>, netdev@...r.kernel.org
Cc:     Andrew Lunn <andrew@...n.ch>,
        Vivien Didelot <vivien.didelot@...il.com>,
        Vladimir Oltean <olteanv@...il.com>,
        UNGLinuxDriver@...rochip.com, DENG Qingfang <dqfext@...il.com>,
        Kurt Kanzenbach <kurt@...utronix.de>,
        Hauke Mehrtens <hauke@...ke-m.de>,
        Woojung Huh <woojung.huh@...rochip.com>,
        Sean Wang <sean.wang@...iatek.com>,
        Landen Chao <Landen.Chao@...iatek.com>,
        Alexandre Belloni <alexandre.belloni@...tlin.com>,
        George McCollister <george.mccollister@...il.com>,
        John Crispin <john@...ozen.org>,
        Aleksander Jan Bajkowski <olek2@...pl>,
        Egil Hjelmeland <privat@...l-hjelmeland.no>,
        Oleksij Rempel <o.rempel@...gutronix.de>,
        Prasanna Vengateshan <prasanna.vengateshan@...rochip.com>,
        Ansuel Smith <ansuelsmth@...il.com>,
        Alvin Šipraga <alsi@...g-olufsen.dk>
Subject: Re: [PATCH v3 net-next 9/9] selftests: net: dsa: add a stress test
 for unlocked FDB operations

On 10/22/21 10:27 AM, Vladimir Oltean wrote:
> This test is a bit strange in that it is perhaps more manual than
> others: it does not transmit a clear OK/FAIL verdict, because user space
> does not have synchronous feedback from the kernel. If a hardware access
> fails, it is in deferred context.
> 
> Nonetheless, on sja1105 I have used it successfully to find and solve a
> concurrency issue, so it can be used as a starting point for other
> driver maintainers too.
> 
> Signed-off-by: Vladimir Oltean <vladimir.oltean@....com>

Reviewed-by: Florian Fainelli <f.fainelli@...il.com>
-- 
Florian