Re: [RFC/PATCH, 2/4] readX_check() performance evaluation

From: Linus Torvalds <torvalds_at_osdl.org>
Date: 2004-01-29 07:06:12
On Wed, 28 Jan 2004, Andi Kleen wrote:
>
> On Wed, 28 Jan 2004 11:33:33 -0800 (PST)
> Linus Torvalds <torvalds@osdl.org> wrote:
> 
> > For example, if checking for an error involves actually reading a value 
> > from a bridge register, then that implies some _serious_ amount of 
> > serialization and external CPU stuff.
> 
> Which is _extremly_ hard to do from an MCE handler ...

So don't do it in the MCE handler.

Just set a flag aka "may need checking", and let the check be done by the 
actual "read_pcix_error()" code.

		Linus
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Received on Wed Jan 28 15:09:01 2004

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