linux-kernel - Re: [PATCH/RFT] finish i386 and x86-64 sysdata conversion

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Date:	Tue, 07 Aug 2007 21:21:24 -0400
From:	Jeff Garzik <jeff@...zik.org>
To:	Yinghai Lu <yhlu.kernel@...il.com>
CC:	Muli Ben-Yehuda <muli@...ibm.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Andi Kleen <ak@...e.de>, riku.seppala@...p.net,
	Andy Whitcroft <apw@...dowen.org>,
	Chuck Ebbert <cebbert@...hat.com>,
	linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH/RFT] finish i386 and x86-64 sysdata conversion

Yinghai Lu wrote:
> the sysdata stuff try to fix:
> when calgary iommu code was introduced, it is trying to share sysdata
> that orginally is initialized k8_bus.c and used by pcibus_to_node. but
> that only happen with AMD K8 platform. and have nothing to do with
> calgary.

incorrect:  sysdata is initialized when the structure is created, which 
clearly not only in k8_bus.c


> Then my patch get_mp_bus_to_node_as_early will use that sysdata as
> node as early as possible before the pci_scan bus is called.

that's incorrect, since it assumes NUMA owns ->sysdata


> then Mul came out his patch ...to split the sharing that will never happen.

that's incorrect, ->sysdata will be shared among Calgary, NUMA, and 
PCI-domain support.


> Also i don't think anyone test muli sysdata patch with amd64 platform
> with acpi=off. even muli himself.

I did.  I did all PCI domain support development on AMD64 platform.


> calgary support bus numa at this time? i mean mult peer root bus on
> different node..

My PCI domains patch add support for multiple peer root buses.  That's 
the definition of PCI domain support.

Branch 'pciseg' of
git://git.kernel.org/pub/scm/linux/kernel/git/jgarzik/misc-2.6.git

	Jeff


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