Re: Patch to 2.6.8.1-mm2 to allow multiple NMI handlers to be registered

[Corey Minyard]

Andreas Dilger wrote:

> On Aug 19, 2004  09:35 -0500, Corey Minyard wrote:
>  
>
> > * Allow multiple handlers to be registered and return if they have 
> > handled the NMI or not.  oprofile and nmi_watchdog are modified to use this.
> >    
>
> Why not use a notifier call chain as is done with panic & friends instead
> of implementing the same thing specifically for NMI?
>
>  
A couple of reasons:

* The "handled" value needs to be passed around so handler know if 
previous handlers have already handled the NMI.
* It allows the list of registered NMI handlers to be dumped in 
/proc/interrupts

I thought that the notifiers callout used locks (which would be a 
no-go), but it doesn't.  So I can scratch that one from my list.

Thanks,

-Corey
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