Subject: Re: [Bugme-new] [Bug 14794] New: IP address assigned by DHCP is dropped after ~40 seconds

From: Jarek Poplawski <[email-masked]>
Date: Thu, 17 Dec 2009 22:44:44 +0100

Andrew Morton wrote, On 12/17/2009 10:24 PM:

> On Thu, 17 Dec 2009 21:53:20 +0100
> N__meth M__rton <[email-masked]> wrote:
> 
>> Hi,
>>
>> I bisected the problem, see http://bugzilla.kernel.org/show_bug.cgi?id=14794
>> for details. Any idea what is the relation between this problem and the found
>> patch?
>>
> 
> Please don't update this report via the bugillla interface.  See
> "(switched to email.  Please respond via emailed reply-to-all, not via
> the bugzilla web interface)."
> 
> : 61cbe54d9479ad98283b2dda686deae4c34b2d59 is the first bad commit
> : commit 61cbe54d9479ad98283b2dda686deae4c34b2d59
> : Author: Mike Galbraith <[email-masked]>
> : Date:   Wed Sep 9 15:41:37 2009 +0200
> :
> :    sched: Keep kthreads at default priority
> 
> Strange.  Might be a timing thing bu a) I doubt if any kernel threads
> are involved in maintaining a DHCP lease and b) even if they were, such
> a race wouldn't be this repeatable.
> 

"Removes kthread/workqueue priority boost[...]" - if there could be
workqueues involved - maybe something with link-watch?

Jarek P.