netdev - Re: UDP sockets oddities

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Message-ID: <1503705440.11498.9.camel@edumazet-glaptop3.roam.corp.google.com>
Date:   Fri, 25 Aug 2017 16:57:20 -0700
From:   Eric Dumazet <eric.dumazet@...il.com>
To:     Florian Fainelli <f.fainelli@...il.com>
Cc:     netdev@...r.kernel.org, edumazet@...il.com, pabeni@...hat.com,
        willemb@...gle.com, davem@...emloft.net
Subject: Re: UDP sockets oddities

On Fri, 2017-08-25 at 16:18 -0700, Florian Fainelli wrote:

> Eric, are there areas of the stack where we are allowed to drop packets,
> not propagate that back to write(2) and also not increment any counter
> either, or maybe I am not looking where I should...

What happens if you increase these sysctls ?

grep .  `find /proc/sys|grep unres_qlen`


unres_qlen_bytes -> 2000000
unres_qlen -> 10000