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SubjectRe: [BK PATCH] PCI Express patches for 2.4.27-pre3
On Tue, May 25, 2004 at 09:54:53AM -0300, Marcelo Tosatti wrote:
> Hi kernel fellows,
> On Tue, May 25, 2004 at 12:32:31PM +0100, Matthew Wilcox wrote:
> > On Tue, May 25, 2004 at 01:00:06AM -0700, Greg KH wrote:
> > > > how does this mesh with the "2.4 is now feature frozen"?
> > >
> > > As the major chunk of ACPI support just got added to the tree, and the
> > > only reason that went in was for this patch, I assumed that it was
> > > acceptable.
> major? the MMConfig support is minimal as I can see?

It isn't that big of a patch, but it is make to core PCI code.

> > > Marcelo, feel free to tell me otherwise if you do not want
> > > this in the 2.4 tree.
> Is this code necessary for PCI-Express devices/busses to work properly?

Not that I can tell, the main point is accessing the extended config
space, and speeding up the access to the device to its natural speed.

> > I assume it was added because Len tries to keep ACPI in 2.4 and 2.6 as
> > close to identical as possible. It certainly doesn't hurt anyone to add
> > the ACPI functionality without the MMConfig support.
> I've humbly asked Len to stop doing big updates whenever possible on the
> v2.4 ACPI code, and do bugfixes only instead. Is that a pain in the ass for you, Len?
> I asked that because it is common to see new bugs introduced by an ACPI update,
> and you know that more than I do.

Yes, I know that quite well :)

So, because of this, you are saying that we should not apply these
patches at this time?

If so, that's fine with me, as now any distro that wants to add this to
their 2.4 kernel can, as the patches are public.

> PS: Greg, about the PCI-Express hotplug drivers, I assume they are independant
> on any of this?

Yes, that is independant of these changes (that is required as there is
no other way to control the pci hotplug controller of those systems,
except with the driver I had submitted in the past to you.).


greg k-h
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