netdev - Re: [Bugme-new] [Bug 10326] New: inconsistent lock state in net_rx

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Message-ID: <20080327124928.GE2845@ami.dom.local>
Date:	Thu, 27 Mar 2008 13:49:28 +0100
From:	Jarek Poplawski <jarkao2@...il.com>
To:	Peter Zijlstra <a.p.zijlstra@...llo.nl>
Cc:	Andrew Morton <akpm@...ux-foundation.org>, netdev@...r.kernel.org,
	bugme-daemon@...zilla.kernel.org, marcus@...ter.se,
	Stephen Hemminger <shemminger@...ux-foundation.org>,
	"Rafael J. Wysocki" <rjw@...k.pl>,
	LKML <linux-kernel@...r.kernel.org>, Ingo Molnar <mingo@...e.hu>
Subject: Re: [Bugme-new] [Bug 10326] New: inconsistent lock state in
	net_rx_action

On Thu, Mar 27, 2008 at 01:30:14PM +0100, Peter Zijlstra wrote:
...
> My guess is that it is a race between polling the device and irq pushing
> the packet. That is, normally the IRQ handler wins and netpoll doesn't
> have anything to do and it doesn't traverse this code path.
> 
> (although I must admit to being a little out of my depth here)

Probably you're right but there were really a lot of testing and
stressing netconsole for misterious lockups for quite a long time
with this new napi, so it's hard to believe this was hidden so
well...

Jarek P.
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