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

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Message-ID: <20080327100700.GA2845@ami.dom.local>
Date:	Thu, 27 Mar 2008 11:07:00 +0100
From:	Jarek Poplawski <jarkao2@...il.com>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	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>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	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 02:18:12AM -0700, Andrew Morton wrote:
...
> Anyway, the accusation is that lockdep is busted, in that it doesn't realise that
> local_irq_disable() blocks softirqs.

Usually lockdep gets this right, so I've some doubts too. But here
it's not only about softirqs; this:

> >> Mar 25 19:48:46 better kernel:  #1:  (target_list_lock){--..}, at: [<c0399c0d>]

means lockdep saw hardirqs enabled while acquiring/holding this lock.

Jarek P.
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