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

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Date:	Thu, 17 Dec 2009 22:44:44 +0100
From:	Jarek Poplawski <jarkao2@...il.com>
To:	Andrew Morton <akpm@...ux-foundation.org>
CC:	Németh Márton <nm127@...email.hu>,
	Mike Galbraith <efault@....de>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Ingo Molnar <mingo@...e.hu>, netdev@...r.kernel.org,
	bugzilla-daemon@...zilla.kernel.org,
	bugme-daemon@...zilla.kernel.org
Subject: Re: [Bugme-new] [Bug 14794] New: IP address assigned by DHCP is 
  dropped after ~40 seconds

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

> On Thu, 17 Dec 2009 21:53:20 +0100
> N__meth M__rton <nm127@...email.hu> 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 <efault@....de>
> : 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.
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