Hi,
Thank you for sending the information. I understood your
hotplug slot can be handled by acpiphp or pciehp.
Could you give me the following additional information?
o My understanding about the problem is:
- Bad IRQ happen when you hot-add the device,
- and the device is not found in the lspci output
- and the device didn't show up under sysfs
Am I correct?
o Details about the steps to reproduce the problem.
o Does the problem happen with both acpiphp and pciehp?
o The pciehp's debug output. We can get this as follows.
# /sbin/modprobe pciehp pciehp_debug
# dmesg | grep pciehp
Thanks,
Kenji Kaneshige
Krishna Kothapalli wrote:
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 (with 2.6.25 and 2.6.28.3 ). Pls let me know if you want me to run them on a different branch or other steps.
with 2.6.25-14
-------------------
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@localhost linux-2.6.25.x86_64]#ls -lt /sys/bus/pci/slots
total 0
[root@localhost linux-2.6.25.x86_64]# /sbin/modprobe acpiphp
[root@localhost 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@localhost linux-2.6.25.x86_64]# /sbin/rmmod acpiphp
[root@localhost linux-2.6.25.x86_64]# ls -lt /sys/bus/pci/slots
total 0
[root@localhost linux-2.6.25.x86_64]# /sbin/modprobe pciehp
[root@localhost 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@localhost linux-2.6.25.x86_64]# /sbin/rmmod pciehp
[root@localhost linux-2.6.25.x86_64]# /sbin/modprobe shpchp
[root@localhost linux-2.6.25.x86_64]# ls -lt /sys/bus/pci/slots
total 0
with 2.6.28.3
---------------
build with 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 2.6.28.3 #1 SMP Tue Feb 3 16:51:23 PST 2009 x86_64 x86_64 x86_64 GNU/Linux
#ls -lt /sys/bus/pci/slots
total 0
# /sbin/modprobe acpiphp
# ls -lt /sys/bus/pci/slots
total 0
drwxr-xr-x 2 root root 0 2009-02-03 18:15 2
## /var/log/messages contains following messages
Feb 3 18:15:06 localhost kernel: acpiphp: ACPI Hot Plug PCI Controller Driver version: 0.5
Feb 3 18:15:06 localhost kernel: acpiphp: Slot [2] registered
# /sbin/rmmod acpiphp
# ls -lt /sys/bus/pci/slots
total 0
# /sbin/modprobe pciehp
# ls -lt /sys/bus/pci/slots
total 0
drwxr-xr-x 2 root root 0 2009-02-03 18:19 96
/var/log/messages:-
Feb 3 18:19:35 localhost kernel: pciehp 0000:00:09.0:pcie02: Link Active Reporting supported
Feb 3 18:19:36 localhost kernel: pciehp 0000:00:09.0:pcie02: Command not completed in 1000 msec
Feb 3 18:19:36 localhost kernel: pciehp 0000:00:09.0:pcie02: HPC vendor_id 8086 device_id 3410 ss_vid 0 ss_did 0
Feb 3 18:19:37 localhost kernel: pciehp 0000:00:09.0:pcie02: Command not completed in 1000 msec
Feb 3 18:19:37 localhost kernel: pciehp 0000:00:09.0:pcie02: Registering domain:bus:dev=0000:09:00 hp_slot=0 sun=60 slot_device_offset=0
Feb 3 18:19:37 localhost kernel: pciehp 0000:00:09.0:pcie02: get_power_status: physical_slot = 96
Feb 3 18:19:37 localhost kernel: pciehp 0000:00:09.0:pcie02: hpc_get_power_status: SLOTCTRL a8 value read 7bf
Feb 3 18:19:37 localhost kernel: pciehp 0000:00:09.0:pcie02: get_attention_status: physical_slot = 96
Feb 3 18:19:37 localhost kernel: pciehp 0000:00:09.0:pcie02: hpc_get_attention_status: SLOTCTRL a8, value read 7bf
Feb 3 18:19:37 localhost kernel: pciehp 0000:00:09.0:pcie02: get_latch_status: physical_slot = 96
Feb 3 18:19:37 localhost kernel: pciehp 0000:00:09.0:pcie02: get_adapter_status: physical_slot = 96
Feb 3 18:19:37 localhost kernel: pciehp: PCI Express Hot Plug Controller Driver version: 0.4
# /sbin/rmmod pciehp
# /sbin/modprobe shpchp
# ls -lt /sys/bus/pci/slots
total 0
/var/log/messages:-
Feb 3 18:21:05 localhost kernel: shpchp: Standard Hot Plug PCI Controller Driver version: 0.4
# /sbin/rmmod shpchp
#
[root@localhost linux-2.6.25.x86_64]# /sbin/rmmod shpchp
[root@localhost linux-2.6.25.x86_64]#
Thanks,
Krishna
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