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From:   Thomas Gleixner <tglx@linutronix.de>
To:     Stephen Hemminger <stephen@networkplumber.org>
Cc:     "Ahmed S. Darwish" <a.darwish@linutronix.de>,
        Peter Zijlstra <peterz@infradead.org>,
        Ingo Molnar <mingo@redhat.com>, Will Deacon <will@kernel.org>,
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        "David S. Miller" <davem@davemloft.net>,
        Jakub Kicinski <kuba@kernel.org>, netdev@vger.kernel.org
Subject: Re: [PATCH v1 01/25] net: core: device_rename: Use rwsem instead of a seqcount
In-Reply-To: <20200519161141.5fbab730@hermes.lan>
References: <20200519214547.352050-1-a.darwish@linutronix.de> <20200519214547.352050-2-a.darwish@linutronix.de> <20200519150159.4d91af93@hermes.lan> <87v9kr5zt7.fsf@nanos.tec.linutronix.de> <20200519161141.5fbab730@hermes.lan>
Date:   Wed, 20 May 2020 01:42:30 +0200
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Stephen Hemminger <stephen@networkplumber.org> writes:
> On Wed, 20 May 2020 00:23:48 +0200
> Thomas Gleixner <tglx@linutronix.de> wrote:
>> No. We did not. -ENOTESTCASE
>
> Please try, it isn't that hard..
>
> # time for ((i=0;i<1000;i++)); do ip li add dev dummy$i type dummy; done
>
> real	0m17.002s
> user	0m1.064s
> sys	0m0.375s

And that solves the incorrectness of the current code in which way?