linux-kernel - Re: Kernel Options: To use MSI-X or not?

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Date:	Wed, 04 Nov 2009 18:05:39 -0600
From:	Robert Hancock <hancockrwd@...il.com>
To:	Justin Piszcz <jpiszcz@...idpixels.com>
CC:	linux-kernel@...r.kernel.org
Subject: Re: Kernel Options: To use MSI-X or not?

On 11/04/2009 10:53 AM, Justin Piszcz wrote:
> Hello,
>
> I was curious whether its best to use MSI-X when the driver supports it
> or not?
>
> Example, 3ware cards/Intel Audio Drivers you can use MSI-X instead of
> having several devices use/share an interrupt.
>
> What are the pros/cons to using MSI-X vs. having devices share an IRQ?

Normally using MSI/MSI-X is always better (or at least no worse), 
assuming it works properly on the system and on the device.. Hopefully 
by this point we've fixed most or all the system-related problems or 
forced MSI off on platforms where it can't work properly.
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