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From: Ben Greear <greearb@candelatech.com>
To: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: Michael Leun <lkml20100708@newton.leun.net>,
	Greg KH <greg@kroah.com>,
	netdev@vger.kernel.org, davem@davemloft.net,
	linux-kernel@vger.kernel.org,
	Alexey Dobriyan <adobriyan@gmail.com>,
	Patrick McHardy <kaber@trash.net>
Subject: Re: NET_NS: unregister_netdevice: waiting for lo to become free (after using openvpn)
Date: Thu, 05 Aug 2010 09:57:14 -0700	[thread overview]
Message-ID: <4C5AED6A.8040602@candelatech.com> (raw)
In-Reply-To: <m1y6clz8ta.fsf_-_@fess.ebiederm.org>

On 08/05/2010 02:51 AM, Eric W. Biederman wrote:
> Michael Leun<lkml20100708@newton.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@candelatech.com>
Candela Technologies Inc  http://www.candelatech.com


      parent reply	other threads:[~2010-08-05 16:57 UTC|newest]

Thread overview: 32+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2010-07-08 16:40 sysfs bug when using tun with network namespaces Michael Leun
2010-07-09 23:57 ` Greg KH
2010-07-10  8:15   ` Michael Leun
2010-07-10 14:08     ` Greg KH
2010-07-10 14:52       ` Michael Leun
2010-07-10 21:53         ` NET_NS: unregister_netdevice: waiting for lo to become free (after using openvpn) (was Re: sysfs bug when using tun with network namespaces) Michael Leun
2010-07-11 14:16           ` Greg KH
2010-07-11 17:29           ` FW: " Michael Leun
2010-08-04 13:35             ` Michael Leun
2010-08-04 21:46               ` Greg KH
2010-08-04 22:04                 ` NET_NS: unregister_netdevice: waiting for lo to become free (after using openvpn) Eric W. Biederman
2010-08-04 22:11                 ` NET_NS: unregister_netdevice: waiting for lo to become free (after using openvpn) (was Re: sysfs bug when using tun with network namespaces) Michael Leun
2010-08-05  0:12                   ` Eric W. Biederman
2010-08-05  9:25                     ` Michael Leun
2010-08-05  9:25                       ` Michael Leun
2010-08-05  9:51                       ` NET_NS: unregister_netdevice: waiting for lo to become free (after using openvpn) Eric W. Biederman
2010-08-05  9:51                         ` Eric W. Biederman
2010-08-05 10:13                         ` Michael Leun
2010-08-05 11:47                         ` NET_NS: unregister_netdevice: waiting for lo to become free (adding ipv6 address to interface) Michael Leun
2010-08-05 19:57                           ` Eric W. Biederman
2010-08-05 20:11                             ` David Miller
2010-08-05 23:45                               ` lkml20100708
2010-08-06  0:09                             ` Michael Leun
2010-10-21 15:15                           ` Michael Leun
2010-10-22 12:48                             ` David Lamparter
2010-10-22 17:05                               ` Michael Leun
2010-10-24 13:15                                 ` Michael Leun
2010-12-06 16:08                                   ` Menil Jean-Philippe
2010-12-06 21:22                                     ` Eric W. Biederman
2010-12-06 22:47                                       ` Michael Leun
2010-12-07 10:40                                         ` Menil Jean-Philippe
2010-08-05 16:57                         ` Ben Greear [this message]

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