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

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Message-ID: <1341413521.2507.125.camel@laptop>
Date:	Wed, 04 Jul 2012 16:52:00 +0200
From:	Peter Zijlstra <peterz@...radead.org>
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 16:50 +0200, Peter Zijlstra wrote:
> 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?

Also, I much prefer obviously broken over subtly broken.

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