netdev - Re: [ISSUE][4.20.6] mlx5 and checksum failures

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Message-ID: <20190207214046.GA10664@localhost.localdomain>
Date:   Thu, 7 Feb 2019 19:40:46 -0200
From:   Marcelo Ricardo Leitner <marcelo.leitner@...il.com>
To:     Ian Kumlien <ian.kumlien@...il.com>
Cc:     Cong Wang <xiyou.wangcong@...il.com>,
        David Miller <davem@...emloft.net>,
        Saeed Mahameed <saeedm@...lanox.com>,
        Linux Kernel Network Developers <netdev@...r.kernel.org>
Subject: Re: [ISSUE][4.20.6] mlx5 and checksum failures

On Wed, Feb 06, 2019 at 11:41:28PM +0100, Ian Kumlien wrote:
> On Wed, Feb 6, 2019 at 11:38 PM Cong Wang <xiyou.wangcong@...il.com> wrote:
> > On Wed, Feb 6, 2019 at 2:15 PM Ian Kumlien <ian.kumlien@...il.com> wrote:
> > > Could we please schedule this for 4.19 and 4.20 - it's kinda breaking things
> >
> > It doesn't break anything, packets are _not_ dropped, only that the
> > warning itself is noisy.
> 
> Not my experience, to me it slows the machine down and looses packets,
> I don't however know
> if this is the only culprit
> 
> You can actually see it on ping where it start out with 0.0xyx and
> ends up at ~10ms

Serial console is a/the killer in these situations.