Re: [BK PATCH] PCI Express patches for 2.4.27-pre3

[Greg KH]

On Tue, May 25, 2004 at 01:59:04PM -0300, Marcelo Tosatti wrote:
> On Tue, May 25, 2004 at 07:40:56AM -0700, Greg KH wrote:
> > 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? 
> 
> Yeap, I would prefer not to apply them at this time. For one, Arjan told
> me privately it can break XFree86 which accesses the PCI config space directly.
> Right?

Um, not that I know of.  2.6 has had this code for a while now with no
reported problems.

Arjan, is there something I need to know about?  :)

> > 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.
> 
> Yeap. 

Ok, no problem, thanks for looking at it.

greg k-h
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