netdev - Re: [PATCH] netconsole: Disable softirqs in write

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Message-ID: <20081119102145.GA15741@elte.hu>
Date:	Wed, 19 Nov 2008 11:21:46 +0100
From:	Ingo Molnar <mingo@...e.hu>
To:	David Miller <davem@...emloft.net>
Cc:	jarkao2@...il.com, jeff@...zik.org, johannes@...solutions.net,
	wferi@...f.hu, netdev@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] netconsole: Disable softirqs in write_msg()


* David Miller <davem@...emloft.net> wrote:

> From: Ingo Molnar <mingo@...e.hu>
> Date: Wed, 19 Nov 2008 11:14:41 +0100
> 
> > Thanks! We strengthened/cleaned up the bh checks a tiny bit 
> > recently, maybe that caused this to pop up. It might explain some 
> > netconsole lockups perhaps? Or, the new warning might be bogus. 
> > It's a bit of a maze.
> 
> See my other reply to Jarek's patch posting, we're supposed to 
> ignore all RX packets in this situation, and all the logic appears 
> to be there, but it's not happening on that person's system for some 
> reason.

Saw that ... an insanely complex scenario.

So at least there's a partial result: it appears to not be a false 
positive warning in the generic softirq/lockdep code.

	Ingo
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