linux-kernel - RE: [PATCH] printk: fixing the deadlock when calling printk in nmi handle

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Date:	Wed, 04 Jul 2012 16:50:31 +0200
From:	Peter Zijlstra <a.p.zijlstra@...llo.nl>
To:	"Liu, Chuansheng" <chuansheng.liu@...el.com>
Cc:	"'linux-kernel@...r.kernel.org' (linux-kernel@...r.kernel.org)" 
	<linux-kernel@...r.kernel.org>, "kay@...y.org" <kay@...y.org>,
	"gregkh@...uxfoundation.org" <gregkh@...uxfoundation.org>,
	"mingo@...e.hu" <mingo@...e.hu>
Subject: RE: [PATCH] printk: fixing the deadlock when calling printk in nmi
 handle

On Wed, 2012-07-04 at 14:46 +0000, Liu, Chuansheng wrote:
> > > I took many time to dig out this issue.
> > 
> > Well, it was a known issue..
> Still feel unfair :)
> If this is a known issue that calling printk is not safe in nmi handler,
> Why not defense it like this patch before real solution coming out?

Why replace one broken thing with another broken thing?

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