PCI: Failed to allocate mem resource

Hi EveryOne,

I have installed CentOS 5.5 with virtualization Linux kernel version 2.6.18-194.el5xen
on Dell R710 rack server, which is having 4 on board broadcom 1Gb NICs and one external Intel 82599 10Gb NIC on PCIe slot. After installation and setting max_vfs=7
parameter in /etc/modprobe.conf file for Virtual Ethernet adapters, and the necessary parameters in /etc/grub.conf (iommu=1[also tried force] msi=1 pci_pt_e820_access=on). I am getting the following error. I pasted below the partial dmesg output which shows the actual problem.
I used the latest ixgbe (version 75) driver for Intel 10Gb NIC.

PCI: Failed to allocate mem resource #12:100000@0 for 0000:04:00.0
ixgbe 0000:04:00.0: not enough MMIO resources for SR-IOV
ixgbe: 0000:04:00.0: ixgbe_probe_vf: Failed to enable PCI sriov: -12

dmesg: partial output
ixgbe: Intel(R) 10 Gigabit PCI Express Network Driver - version 2.0.44-k2
ixgbe: Copyright (c) 1999-2010 Intel Corporation.
GSI 24 sharing vector 0x59 and IRQ 24
ACPI: PCI Interrupt 0000:04:00.0[A] -> GSI 34 (level, low) -> IRQ 24
PCI: Setting latency timer of device 0000:04:00.0 to 64
input: PC Speaker as /class/input/input3
scsi 0:0:32:0: Attached scsi generic sg0 type 13
sd 0:2:0:0: Attached scsi generic sg1 type 0
scsi 1:0:0:0: Attached scsi generic sg2 type 5
PCI: Failed to allocate mem resource #12:100000@0 for 0000:04:00.0
ixgbe 0000:04:00.0: not enough MMIO resources for SR-IOV
ixgbe: 0000:04:00.0: ixgbe_probe_vf: Failed to enable PCI sriov: -12
ixgbe: 0000:04:00.0: ixgbe_init_interrupt_scheme: Multiqueue Enabled: Rx Queue count = 16, Tx Queue count = 16
ixgbe 0000:04:00.0: (PCI Express:5.0Gb/s:Width x4) 00:1b:21:66:ac:3a
ixgbe 0000:04:00.0: MAC: 2, PHY: 11, SFP+: 5, PBA No: e68787-002
ixgbe 0000:04:00.0: PCI-Express bandwidth available for this card is not sufficient for optimal performance.
ixgbe 0000:04:00.0: For optimal performance a x8 PCI-Express slot is required.
ixgbe 0000:04:00.0: Intel(R) 10 Gigabit Network Connection

How can I fix the errors in bold. Help in this regards is highly appreciated.

Thanks,
Ramana

This forum is for help with the DirectAdmin control panel for webhosting. I suspect you'd get better help on a forum specializing on the OS/driver combination you're using.

On our forum your post is Off-Topic; it's been moved to the proper subforum.

Jeff