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From: Marc Haber <mh+netdev@zugschlus.de>
To: Paolo Abeni <pabeni@redhat.com>
Cc: netdev@vger.kernel.org
Subject: Re: After a while of system running no incoming UDP any more?
Date: Fri, 28 Jul 2017 14:14:34 +0200	[thread overview]
Message-ID: <20170728121434.vld76q7kohzpmtk2@torres.zugschlus.de> (raw)
In-Reply-To: <1501229277.2597.1.camel@redhat.com>

On Fri, Jul 28, 2017 at 10:07:57AM +0200, Paolo Abeni wrote:
> Ad a workaround you can disable UDP early demux:
> 
> echo 0 > /proc/sys/net/ipv4/udp_early_demux
> 
> (will affect both ipv4 and ipv6).
> 
> and (if the system  is already into the bad state) increase the udp
> accounted memory limit, writing in /proc/sys/net/ipv4/udp_mem greater
> values than the current ones (the actual values depends on the system
> total memory).

I can confirm that these two changes make a system in bad state work
again immediately. Will try the patch on 4.12.4 later today.

Thanks for helping!

Greetings
Marc

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Marc Haber         | "I don't trust Computers. They | Mailadresse im Header
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  reply	other threads:[~2017-07-28 12:14 UTC|newest]

Thread overview: 14+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-07-24 12:09 After a while of system running no incoming UDP any more? Marc Haber
2017-07-24 14:19 ` Paolo Abeni
2017-07-25 11:57   ` Marc Haber
2017-07-25 12:17     ` Paolo Abeni
2017-07-26  8:10       ` Marc Haber
2017-07-26  8:33         ` Paolo Abeni
2017-07-28  6:26   ` Marc Haber
2017-07-28  8:05     ` Eric Dumazet
2017-07-28  8:15       ` Paolo Abeni
2017-07-28  8:41         ` Eric Dumazet
2017-07-28  8:07     ` Paolo Abeni
2017-07-28 12:14       ` Marc Haber [this message]
2017-08-11 14:34         ` Marc Haber
2017-08-11 20:07           ` Marc Haber

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