linux-kernel - Re: [patch] revert: [NET]: Fix races in net_rx

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Message-ID: <20070719160556.GA3330@elte.hu>
Date:	Thu, 19 Jul 2007 18:05:56 +0200
From:	Ingo Molnar <mingo@...e.hu>
To:	Olaf Kirch <olaf.kirch@...cle.com>
Cc:	Jarek Poplawski <jarkao2@...pl>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	linux-kernel@...r.kernel.org, davem@...emloft.net,
	Auke Kok <auke-jan.h.kok@...el.com>
Subject: Re: [patch] revert: [NET]: Fix races in net_rx_action vs netpoll

* Ingo Molnar <mingo@...e.hu> wrote:

> i'll now check whether removing ignore_on_loglevel (no other changes) 
> makes the hang go away. Maybe ignore_on_loglevel is buggy - or it 
> produces an immediate printk (going out to the interface) during a 
> particularly sensitive period of network initialization.

nope, that didnt have any effect. I have another theory: i had a 
network-intense stress-test going on in the past few hours on the same 
network (not involving the laptop) and i stopped it recently. Perhaps 
that network-intense test also produced periodic broadcast packets that 
got the e1000 out of its weird state before the tx timeout could hit. 
Now that i've stopped the test, the network is quiescent again and the 
e1000 hangs.

	Ingo
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