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Date: Tue, 13 Nov 2007 15:08:04 -0800 From: Gary Hade <garyhade@...ibm.com> To: Matthew Wilcox <matthew@....cx> Cc: Greg KH <greg@...ah.com>, Alex Chiang <achiang@...com>, gregkh@...e.de, kristen.c.accardi@...el.com, lenb@...nel.org, richard.jones2@...com, linux-kernel@...r.kernel.org, linux-pci@...ey.karlin.mff.cuni.cz, pcihpd-discuss@...ts.sourceforge.net, linux-acpi@...r.kernel.org Subject: Re: [PATCH 0/5][RFC] Physical PCI slot objects On Tue, Nov 13, 2007 at 01:11:02PM -0700, Matthew Wilcox wrote: > On Tue, Nov 13, 2007 at 10:51:22AM -0800, Greg KH wrote: > > Ok, again, I want to see the IBM people sign off on this, after testing > > on all of their machines, before I'll consider this, as I know the IBM > > acpi tables are "odd". > > That seems a little higher standard than patches are normally held to. > How about the patches get sent to the appropriate people at IBM (who are > they?) I be one of them. :) I have been involved in many (but not all) of IBM's x86 based (IBM System x) servers with hotplug capable PCI slots. I have mostly worked on 'acpiphp' associated issues. > and if we haven't heard a NAK from them after a month, then they > get applied? I am not fundamentally opposed to this new capability but share the same concerns that Greg and others have expressed. So far, I have only tried the changes on one single node system (IBM x3850) but the below NAK-worthy result supports the idea that the changes need to be well and widely tested. Have you possibly considered a kernel option as a kinder and gentler way of introducing the changes? Gary -- Gary Hade System x Enablement IBM Linux Technology Center 503-578-4503 IBM T/L: 775-4503 garyhade@...ibm.com http://www.ibm.com/linux/ltc ==== IBM x3850 Slots 1-2: PCI-X under PCI root bridges Slots 3-6: PCIe under transparent P2P bridges Slot 1: PCI-X - populated Slot 2: PCI-X - !populated Slot 3: PCIe - populated Slot 4: PCIe - !populated Slot 5: PCIe - !populated Slot 6: PCIe - populated result is with 2.6.24-rc2 plus all 4 proposed patches problem: acpiphp failed to register empty PCIe slots 4 and 5 ==== # dmesg acpiphp: ACPI Hot Plug PCI Controller Driver version: 0.5 acpiphp_glue: found PCI host-bus bridge with hot-pluggable slots acpiphp_glue: found ACPI PCI Hotplug slot 1 at PCI 0000:02:01 acpiphp: Slot [1] registered acpiphp_glue: found PCI host-bus bridge with hot-pluggable slots acpiphp_glue: found ACPI PCI Hotplug slot 2 at PCI 0000:06:01 acpiphp: Slot [2] registered acpiphp_glue: found PCI-to-PCI bridge at PCI 0000:0a:00.0 acpiphp_glue: found ACPI PCI Hotplug slot 3 at PCI 0000:0b:00 acpiphp: Slot [3] registered acpiphp_glue: found PCI-to-PCI bridge at PCI 0000:0f:00.0 acpiphp_glue: found ACPI PCI Hotplug slot 4 at PCI 0000:10:00 acpiphp: pci_hp_register failed with error -17 acpiphp_glue: acpiphp_register_hotplug_slot failed(err code = 0xffffffef) acpiphp_glue: found ACPI PCI Hotplug slot 4 at PCI 0000:10:00 acpiphp: pci_hp_register failed with error -17 acpiphp_glue: acpiphp_register_hotplug_slot failed(err code = 0xffffffef) acpiphp_glue: found ACPI PCI Hotplug slot 4 at PCI 0000:10:00 acpiphp: pci_hp_register failed with error -17 acpiphp_glue: acpiphp_register_hotplug_slot failed(err code = 0xffffffef) acpiphp_glue: found ACPI PCI Hotplug slot 4 at PCI 0000:10:00 acpiphp: pci_hp_register failed with error -17 acpiphp_glue: acpiphp_register_hotplug_slot failed(err code = 0xffffffef) acpiphp_glue: found ACPI PCI Hotplug slot 4 at PCI 0000:10:00 acpiphp: pci_hp_register failed with error -17 acpiphp_glue: acpiphp_register_hotplug_slot failed(err code = 0xffffffef) acpiphp_glue: found ACPI PCI Hotplug slot 4 at PCI 0000:10:00 acpiphp: pci_hp_register failed with error -17 acpiphp_glue: acpiphp_register_hotplug_slot failed(err code = 0xffffffef) acpiphp_glue: found ACPI PCI Hotplug slot 4 at PCI 0000:10:00 acpiphp: pci_hp_register failed with error -17 acpiphp_glue: acpiphp_register_hotplug_slot failed(err code = 0xffffffef) acpiphp_glue: found ACPI PCI Hotplug slot 4 at PCI 0000:10:00 acpiphp: pci_hp_register failed with error -17 acpiphp_glue: acpiphp_register_hotplug_slot failed(err code = 0xffffffef) acpiphp_glue: found PCI-to-PCI bridge at PCI 0000:14:00.0 acpiphp_glue: found ACPI PCI Hotplug slot 5 at PCI 0000:15:00 acpiphp: pci_hp_register failed with error -17 acpiphp_glue: acpiphp_register_hotplug_slot failed(err code = 0xffffffef) acpiphp_glue: found ACPI PCI Hotplug slot 5 at PCI 0000:15:00 acpiphp: pci_hp_register failed with error -17 acpiphp_glue: acpiphp_register_hotplug_slot failed(err code = 0xffffffef) acpiphp_glue: found ACPI PCI Hotplug slot 5 at PCI 0000:15:00 acpiphp: pci_hp_register failed with error -17 acpiphp_glue: acpiphp_register_hotplug_slot failed(err code = 0xffffffef) acpiphp_glue: found ACPI PCI Hotplug slot 5 at PCI 0000:15:00 acpiphp: pci_hp_register failed with error -17 acpiphp_glue: acpiphp_register_hotplug_slot failed(err code = 0xffffffef) acpiphp_glue: found ACPI PCI Hotplug slot 5 at PCI 0000:15:00 acpiphp: pci_hp_register failed with error -17 acpiphp_glue: acpiphp_register_hotplug_slot failed(err code = 0xffffffef) acpiphp_glue: found ACPI PCI Hotplug slot 5 at PCI 0000:15:00 acpiphp: pci_hp_register failed with error -17 acpiphp_glue: acpiphp_register_hotplug_slot failed(err code = 0xffffffef) acpiphp_glue: found ACPI PCI Hotplug slot 5 at PCI 0000:15:00 acpiphp: pci_hp_register failed with error -17 acpiphp_glue: acpiphp_register_hotplug_slot failed(err code = 0xffffffef) acpiphp_glue: found ACPI PCI Hotplug slot 5 at PCI 0000:15:00 acpiphp: pci_hp_register failed with error -17 acpiphp_glue: acpiphp_register_hotplug_slot failed(err code = 0xffffffef) acpiphp_glue: found PCI-to-PCI bridge at PCI 0000:19:00.0 acpiphp_glue: found ACPI PCI Hotplug slot 6 at PCI 0000:1a:00 acpiphp: Slot [6] registered acpiphp_glue: Bus 0000:1a has 1 slot acpiphp_glue: Bus 0000:15 has 0 slots acpiphp_glue: Bus 0000:10 has 0 slots acpiphp_glue: Bus 0000:0b has 1 slot acpiphp_glue: Bus 0000:06 has 1 slot acpiphp_glue: Bus 0000:02 has 1 slot acpiphp_glue: Total 4 slots # 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