netdev - Re: Asterisk deadlocks since Kernel 4.1

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Date:	Wed, 02 Dec 2015 18:15:18 +0100
From:	Philipp Hahn <pmhahn@...ahn.de>
To:	Stefan Priebe - Profihost AG <s.priebe@...fihost.ag>,
	Hannes Frederic Sowa <hannes@...essinduktion.org>,
	Florian Weimer <fweimer@...hat.com>
CC:	Thomas Gleixner <tglx@...utronix.de>, netdev@...r.kernel.org,
	linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org,
	herbert@...dor.apana.org.au
Subject: Re: Asterisk deadlocks since Kernel 4.1

Hi,

Am 02.12.2015 um 10:45 schrieb Stefan Priebe - Profihost AG:
> here are the results.
> 
> It works with 4.1.
> It works with 4.2.
> It does not work with 4.1.13.

the patches were first commitet in v4.3-rc3 and appear as backports only
since v4.2.3 and v4.1.10

> git bisect tells me it stopped working after those two commits were applied:
> 
> commit d48623677191e0f035d7afd344f92cf880b01f8e
> Author: Herbert Xu <herbert@...dor.apana.org.au>
> Date:   Tue Sep 22 11:38:56 2015 +0800
> 
>     netlink: Replace rhash_portid with bound
> 
> commit 4e27762417669cb459971635be550eb7b5598286
> Author: Herbert Xu <herbert@...dor.apana.org.au>
> Date:   Fri Sep 18 19:16:50 2015 +0800
> 
>     netlink: Fix autobind race condition that leads to zero port ID

I identified the same two patches for our prpblem; see mail from
2015-11-17 16:53 with subject "Strange PF_NETLINK NETLINK_ROUTE stall:
netlink: Fix autobind race condition that leads to zero port ID"

<http://marc.info/?l=linux-kernel&m=144863837825887&w=2>

Philipp
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