linux-kernel - Re: hotplug create

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Message-ID: <48C520A5.8060001@jp.fujitsu.com>
Date:	Mon, 08 Sep 2008 21:55:01 +0900
From:	Kenji Kaneshige <kaneshige.kenji@...fujitsu.com>
To:	Alex Chiang <achiang@...com>, Yinghai Lu <yhlu.kernel@...il.com>,
	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

Alex Chiang wrote:
> * 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?
> 

I'm sorry, but I don't have any idea so far.

Yinghai, does this happen even when pciehp is not configured?

Thanks,
Kenji Kaneshige

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