netdev - Re: Glibc recvmsg from kernel netlink socket hangs forever

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Date:	Thu, 24 Sep 2015 22:34:10 -0700
From:	Guenter Roeck <linux@...ck-us.net>
To:	Herbert Xu <herbert@...dor.apana.org.au>
Cc:	Steven Schlansker <stevenschlansker@...il.com>,
	linux-kernel@...r.kernel.org, Eric Dumazet <edumazet@...gle.com>,
	netdev@...r.kernel.org
Subject: Re: Glibc recvmsg from kernel netlink socket hangs forever

Herbert,

On 09/24/2015 09:58 PM, Herbert Xu wrote:
> On Thu, Sep 24, 2015 at 09:36:53PM -0700, Guenter Roeck wrote:
>>
>> http://comments.gmane.org/gmane.linux.network/363085
>>
>> might explain your problem.
>>
>> I thought this was resolved in 4.1, but it looks like the problem still persists
>> there. At least I have reports from my workplace that 4.1.6 and 4.1.7 are still
>> affected. I don't know if there have been any relevant changes in 4.2.
>>
>> Copying Herbert and Eric for additional input.
>
> There was a separate bug discovered by Tejun recently.  You need
> to apply the patches
>
> https://patchwork.ozlabs.org/patch/519245/
> https://patchwork.ozlabs.org/patch/520824/
>
I assume this is on top of mainline ?

> There is another follow-up but it shouldn't make any difference
> in practice.
>

Any idea what may be needed for 4.1 ?
I am currently trying https://patchwork.ozlabs.org/patch/473041/,
but I have no idea if that will help with the problem we are seeing there.

Thanks,
Guenter

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