Re: Glibc recvmsg from kernel netlink socket hangs forever

From: Guenter Roeck
Date: Fri Sep 25 2015 - 01:34:28 EST


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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