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Date:	Sat, 6 Sep 2008 22:59:54 -0600
From:	Alex Chiang <achiang@...com>
To:	Yinghai Lu <yhlu.kernel@...il.com>
Cc:	Ingo Molnar <mingo@...e.hu>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	"jbarnes@...tuousgeek.org" <jbarnes@...tuousgeek.org>,
	kaneshige.kenji@...fujitsu.com
Subject: Re: hotplug create_slot hang

* Yinghai Lu <yhlu.kernel@...il.com>:
> On Sat, Sep 6, 2008 at 2:50 PM, Alex Chiang <achiang@...com> wrote:
> > * Yinghai Lu <yhlu.kernel@...il.com>:
> >> calling  pci_hotplug_init+0x0/0x1d
> >> pci_hotplug: PCI Hot Plug PCI Core version: 0.5
> >> initcall pci_hotplug_init+0x0/0x1d returned 0 after 11 msecs
> >>
> >> calling  acpiphp_init+0x0/0x5f
> >> acpiphp: ACPI Hot Plug PCI Controller Driver version: 0.5
> >> decode_hpp: Could not get hotplug parameters. Use defaults
> >> pci_create_slot: created pci_slot on 0000:07:00
> >> acpiphp: Slot [1] registered
> >> decode_hpp: Could not get hotplug parameters. Use defaults
> >> pci_create_slot: created pci_slot on 0000:0d:00
> >> acpiphp: Slot [2] registered
> >> initcall acpiphp_init+0x0/0x5f returned 0 after 105 msecs
> >
> > Is this the hang?
> >
> >> calling  pcied_init+0x0/0x7b
> >> pciehp: HPC vendor_id 8086 device_id 340a ss_vid 0 ss_did 0
> >> pci_create_slot: inc refcount to 2 on 0000:07:00
> >> pci_destroy_slot: dec refcount to 1 on 0000:07:00
> >> pciehp: pci_hp_register failed with error -16
> >> pciehp: pciehp: slot already registered by another hotplug driver
> >
> > This failure is by design -- we only allow one hotplug driver to
> > claim a slot now, and it's "first one loaded wins".
> >
> > Unless you're talking about something else?
> 
> after
> 
> pciehp: pciehp: slot already registered by another hotplug driver
> 
> never go on...

You said that it worked a few days ago, but is hanging now.

Can you bisect it?

Kenji-san, any ideas?

/ac

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