PE1950, PERC 5/i, pci=assign-busses

Layne Miller lmiller at castironsys.com
Mon Sep 29 18:57:23 CDT 2008


I have a PowerEdge 1950 running CentOS 5.2.  It is configured with a
PERC 5/i controller, and also has a PCI-X adapter which seems to require
the pci=assign-busses option.  Whenever I enable the pci=assign-busses
boot option, the system is unable to boot -- it hangs apparently while
initializing the storage.

Following is a snippet from my boot log.  I can provide a more complete
copy if necessary.

...
usb usb2: configuration #1 chosen from 1 choice
hub 2-0:1.0: USB hub found
hub 2-0:1.0: 2 ports detected
ACPI: PCI Interrupt 0000:00:1d.1[B] -> GSI 20 (level, low) -> IRQ 74
uhci_hcd 0000:00:1d.1: UHCI Host Controller
uhci_hcd 0000:00:1d.1: new USB bus registered, assigned bus number 3
uhci_hcd 0000:00:1d.1: irq 74, io base 0x0000dcc0
usb usb3: configuration #1 chosen from 1 choice
hub 3-0:1.0: USB hub found
hub 3-0:1.0: 2 ports detected
ACPI: PCI Interrupt 0000:00:1d.2[C] -> GSI 21 (level, low) -> IRQ 66
uhci_hcd 0000:00:1d.2: UHCI Host Controller
uhci_hcd 0000:00:1d.2: new USB bus registered, assigned bus number 4
uhci_hcd 0000:00:1d.2: irq 66, io base 0x0000dca0
usb usb4: configuration #1 chosen from 1 choice
hub 4-0:1.0: USB hub found
hub 4-0:1.0: 2 ports detected
Loading jbd.ko module
Loading ext3.ko module
Loading scsi_mod.ko module
SCSI subsystem initialized
Loading sd_mod.ko module
Loading megaraid_sas.ko module
megasas: 00.00.03.15-RH1 Wed Nov. 21 10:29:45 PST 2007
megasas: 0x1028:0x0015:0x1028:0x1f03: bus 8:slot 14:func 0
ACPI: PCI Interrupt 0000:08:0e.0[A] -> GSI 78 (level, low) -> IRQ 82
megasas: FW now in Ready state
scsi0 : LSI SAS based MegaRAID driver
usb 1-5: new high speed USB device using ehci_hcd and address 4
usb 1-5: configuration #1 chosen from 1 choice
hub 1-5:1.0: USB hub found
hub 1-5:1.0: 4 ports detected
usb 3-1: new low speed USB device using uhci_hcd and address 2
usb 3-1: configuration #1 chosen from 1 choice
usb 3-2: new low speed USB device using uhci_hcd and address 3
usb 3-2: configuration #1 chosen from 1 choice
input: USBPS2 as /class/input/input0
input: USB HID v1.00 Keyboard [USBPS2] on usb-0000:00:1d.1-2
input: USBPS2 as /class/input/input1
input: USB HID v1.00 Mouse [USBPS2] on usb-0000:00:1d.1-2

... hangs here for several minutes ...

csi 0:0:0:0: megasas: RESET -1 cmd=12 retries=0
megasas: [ 0]waiting for 1 commands to complete
megasas: [ 5]waiting for 1 commands to complete
megasas: [10]waiting for 1 commands to complete
megasas: [15]waiting for 1 commands to complete
megasas: [20]waiting for 1 commands to complete
megasas: [25]waiting for 1 commands to complete
megasas: [30]waiting for 1 commands to complete
...

This behavior occurs whether I have the PCI-X adapter installed or not.
Is this a known problem, and is there a workaround?

Layne
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