Subject: Re: [PATCH 08/18 v2] powerpc: Do not probe PCI buses or eBus devices if CMO is enabled

From: Brian King <[email-masked]>
Date: Mon, 30 Jun 2008 16:56:54 -0500

Paul Mackerras wrote:
> Robert Jennings writes:
> 
>> From: Brian King <[email-masked]>
>>
>> The Cooperative Memory Overcommit (CMO) on System p does not currently
>> support native PCI devices or eBus devices when enabled.
> 
> Then why would we get any native PCI or eBus devices in the device
> tree?

We shouldn't. The reason the patch exists is so that *if* firmware were to
add support for physical PCI/eBus devices in CMO mode in the future, then
we could get into a scenario where there are such devices in the device
tree and we would want to prevent them from getting initialized
on a kernel without the code needed to support such a feature.

-Brian

-- 
Brian King
Linux on Power Virtualization
IBM Linux Technology Center