netdev - Re: localed stuck in recent 3.18 git in copy_net

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Date:	Mon, 20 Oct 2014 14:53:59 -0600
From:	Kevin Fenzi <kevin@...ye.com>
To:	Dave Jones <davej@...hat.com>
Cc:	netdev@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: localed stuck in recent 3.18 git in copy_net_ns?

On Mon, 20 Oct 2014 16:43:26 -0400
Dave Jones <davej@...hat.com> wrote:

> I've seen similar soft lockup traces from the sys_unshare path when
> running my fuzz tester.  It seems that if you create enough network
> namespaces, it can take a huge amount of time for them to be iterated.
> (Running trinity with '-c unshare' you can see the slow down happen.
> In some cases, it takes so long that the watchdog process kills it --
>  though the SIGKILL won't get delivered until the unshare() completes)
> 
> Any idea what this machine had been doing prior to this that may have
> involved creating lots of namespaces ?

That was right after boot. ;) 

This is my main rawhide running laptop.

A 'ip netns list' shows nothing.

kevin

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