linux-kernel - RE: Q: state of pci express hotplug

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Date:	Tue, 3 Feb 2009 15:48:54 -0500
From:	Krishna Kothapalli <krishna_sunitha@...mail.com>
To:	<kaneshige.kenji@...fujitsu.com>
CC:	<ebiederm@...ssion.com>, <linux-pci@...r.kernel.org>,
	<jbarnes@...tuousgeek.org>, <achiang@...com>, <djwong@...ibm.com>,
	<xyzzy@...akeasy.org>, <linux-kernel@...r.kernel.org>
Subject: RE: Q: state of pci express hotplug




> Kenji Kaneshige wrote:
> (1) Build all your hotplug drivers as kernel modules.
> (2) Modprobe hotplug drivers one by one, and check which drivers add
> directories under /sys/bus/pci/slots. Before trying the next driver,
> please rmmod the previous driver, because there are hotplug slots
> that can be managed by the several drivers. Note that you don't need
> to try fakephp this time.
>

Thanks much for the exact steps. Here are the results. Pls let me know if you want me to run them on a different branch or other steps.

Built the kernel with these options:-

CONFIG_HOTPLUG_PCI=y
CONFIG_HOTPLUG_PCI_FAKE=m
CONFIG_HOTPLUG_PCI_ACPI=m
CONFIG_HOTPLUG_PCI_ACPI_IBM=m
# CONFIG_HOTPLUG_PCI_CPCI is not set
CONFIG_HOTPLUG_PCI_SHPC=m

# uname -a
Linux localhost.localdomain 2.6.25-14.fc9.x86_64.kkhp #4 SMP Tue Feb 3 11:12:07 PST 2009 x86_64 x86_64 x86_64 GNU/Linux


[root@...alhost linux-2.6.25.x86_64]#ls -lt /sys/bus/pci/slots
total 0
[root@...alhost linux-2.6.25.x86_64]# /sbin/modprobe acpiphp
[root@...alhost linux-2.6.25.x86_64]# ls -lt /sys/bus/pci/slots
total 0
drwxr-xr-x 2 root root 0 2009-02-03 11:32 2
[root@...alhost linux-2.6.25.x86_64]# /sbin/rmmod acpiphp
[root@...alhost linux-2.6.25.x86_64]# ls -lt /sys/bus/pci/slots
total 0
[root@...alhost linux-2.6.25.x86_64]# /sbin/modprobe pciehp
[root@...alhost linux-2.6.25.x86_64]# ls -lt /sys/bus/pci/slots
total 0
drwxr-xr-x 2 root root 0 2009-02-03 11:33 0009_0096
[root@...alhost linux-2.6.25.x86_64]# /sbin/rmmod pciehp
[root@...alhost linux-2.6.25.x86_64]# /sbin/modprobe shpchp
[root@...alhost linux-2.6.25.x86_64]# ls -lt /sys/bus/pci/slots
total 0
[root@...alhost linux-2.6.25.x86_64]# /sbin/rmmod shpchp
[root@...alhost linux-2.6.25.x86_64]# 


Thanks,
Krishna


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