linux-kernel - Re: [PATCH -v2 6/7] x86, NMI, Add support to notify hardware error with unknown NMI

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Date:	Mon, 27 Sep 2010 11:20:14 -0400
From:	Don Zickus <dzickus@...hat.com>
To:	Robert Richter <robert.richter@....com>
Cc:	huang ying <huang.ying.caritas@...il.com>,
	Huang Ying <ying.huang@...el.com>, Ingo Molnar <mingo@...e.hu>,
	"H. Peter Anvin" <hpa@...or.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Andi Kleen <andi@...stfloor.org>
Subject: Re: [PATCH -v2 6/7] x86, NMI, Add support to notify hardware error
 with unknown NMI

On Mon, Sep 27, 2010 at 03:38:16PM +0200, Robert Richter wrote:
> On 27.09.10 08:47:53, huang ying wrote:
> 
> > I think explicit function calls have better readability than notifier chains.
> 
> What is different to unknown_nmi() then?
> 
> So no, in your case you want to catch unknown nmis for a certain
> hardware and then throw a panic. This should be clearly implemented in
> a separate handler for this piece of hardware.
> 
> We want to cleanup this code and throw out all hardware specific
> snippets, and not introduce new special cases here.

I tend to agree with Robert here.  I don't know if there were any 'rules'
to which handlers get directly called versus ones that go through the
die_chain, so I was originally going to let it go.  But if they aren't
any, it does look cleaner to have everything in die_chains.

Cheers,
Don
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