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Message-ID: <4C5AED6A.8040602@candelatech.com>
Date: Thu, 05 Aug 2010 09:57:14 -0700
From: Ben Greear <greearb@...delatech.com>
To: "Eric W. Biederman" <ebiederm@...ssion.com>
CC: Michael Leun <lkml20100708@...ton.leun.net>,
Greg KH <greg@...ah.com>, netdev@...r.kernel.org,
davem@...emloft.net, linux-kernel@...r.kernel.org,
Alexey Dobriyan <adobriyan@...il.com>,
Patrick McHardy <kaber@...sh.net>
Subject: Re: NET_NS: unregister_netdevice: waiting for lo to become free (after
using openvpn)
On 08/05/2010 02:51 AM, Eric W. Biederman wrote:
> Michael Leun<lkml20100708@...ton.leun.net> writes:
>> Unfortunately looks like indefinitely. Never watched longer so far
>> (rebooted soon), but I'm seeing this message now repeated every 10 secs
>> for ~10 minutes on a idle system.
>
> Ugh. A real bug then. These can be a pain to track down and fix. I
> think the last one of these I tracked down took a couple of weeks. I
> will start digging in when I get back from vacation.
I once spent a similar amount of time putting in debug variants that
printed info for each time a netdev was acquired and released.
Maybe a similar logic could be put into the official kernel (and
disabled by default)?
That should save effort in the long run, I'd think.
Thanks,
Ben
--
Ben Greear <greearb@...delatech.com>
Candela Technologies Inc http://www.candelatech.com
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