linux-kernel - Re: Re: [PATCH 3/3] selftests: net: Add FIN_ACK processing order related latency spike test

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Message-ID: <20200131151302.28040-1-sjpark@amazon.com>
Date:   Fri, 31 Jan 2020 16:13:02 +0100
From:   <sjpark@...zon.com>
To:     Eric Dumazet <edumazet@...gle.com>
CC:     <sjpark@...zon.com>, David Miller <davem@...emloft.net>,
        Shuah Khan <shuah@...nel.org>, netdev <netdev@...r.kernel.org>,
        "open list:KERNEL SELFTEST FRAMEWORK" 
        <linux-kselftest@...r.kernel.org>,
        LKML <linux-kernel@...r.kernel.org>, <sj38.park@...il.com>,
        <aams@...zon.com>, SeongJae Park <sjpark@...zon.de>
Subject: Re: Re: [PATCH 3/3] selftests: net: Add FIN_ACK processing order related latency spike test

On Fri, 31 Jan 2020 06:56:13 -0800 Eric Dumazet <edumazet@...gle.com> wrote:

> On Fri, Jan 31, 2020 at 4:25 AM <sjpark@...zon.com> wrote:
> >
> > From: SeongJae Park <sjpark@...zon.de>
> >
> > This commit adds a test for FIN_ACK process races related reconnection
> > latency spike issues.  The issue has described and solved by the
> > previous commit ("tcp: Reduce SYN resend delay if a suspicous ACK is
> > received").
> >
> 
> I do not know for other tests, but using a hard coded port (4242) is
> going to be flakky, since the port might be already used.
> 
> Please make sure to run tests on a separate namespace.

Agreed, will do so in next spin.


Thanks,
SeongJae Park