CentOS-6.8 PCI Hwdr Issue?

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I have begun to see these messages in my morning reports:

WARNING: Kernel Errors Present
pciehp 0000:00:1c.0:pcie04: Link Training Error occurs …: 146
Time(s)
pciehp 0ng Error occurs …: 1 Time(s)
pcieport 0000:00:1c.0: bridge window [mem 0xd0a000000.0 failed with error -22 …: 1 Time(s)
r8168: probe of 0000:01:00.0 failed with error -22 …: 702 Time(s)
r8168: probe of 0000:01:00.0 failed with erroridge to [bus 01-0

The system is the KVM host for a number of our virtual guest servers. Investigating this further has revealed that these messages being produced in vast numbers and that the messages log file is bloated in consequence.

Sep 16 23:20:01 vhost01 kernel: pciehp 0000:00:1c.0:pcie04: Card not present on Slot(0)
Sep 16 23:20:02 vhost01 kernel: pciehp 0000:00:1c.0:pcie04: Card present on Slot(0)
Sep 16 23:20:03 vhost01 kernel: pciehp 0000:00:1c.0:pcie04: Card not present on Slot(0)
Sep 16 23:20:04 vhost01 kernel: pciehp 0000:00:1c.0:pcie04: Card present on Slot(0)
Sep 16 23:20:05 vhost01 kernel: pciehp 0000:00:1c.0:pcie04: Card not present on Slot(0)
Sep 16 23:20:06 vhost01 kernel: pciehp 0000:00:1c.0:pcie04: Card present on Slot(0)
Sep 16 23:20:07 vhost01 kernel: pciehp 0000:00:1c.0:pcie04: Card not present on Slot(0)
Sep 16 23:20:08 vhost01 kernel: pciehp 0000:00:1c.0:pcie04: Card present on Slot(0)
Sep 16 23:20:09 vhost01 kernel: pciehp 0000:00:1c.0:pcie04: Card not present on Slot(0)
Sep 16 23:20:10 vhost01 kernel: pciehp 0000:00:1c.0:pcie04: Card present on Slot(0)
Sep 16 23:20:10 vhost01 kernel: pciehp 0000:00:1c.0:pcie04: Card not present on Slot(0)
Sep 16 23:20:10 vhost01 kernel: pciehp 0000:00:1c.0:pcie04: Card present on Slot(0)
Sep 16 23:20:10 vhost01 kernel: pciehp 0000:00:1c.0:pcie04: Card not present on Slot(0)
Sep 16 23:20:10 vhost01 kernel: pciehp 0000:00:1c.0:pcie04: Card present on Slot(0)
Sep 16 23:20:10 vhost01 kernel: pciehp 0000:00:1c.0:pcie04: Card not present on Slot(0)
Sep 16 23:20:10 vhost01 kernel: pciehp 0000:00:1c.0:pcie04: Card present on Slot(0)
Sep 16 23:20:10 vhost01 kernel: pciehp 0000:00:1c.0:pcie04: Card not present on SSep 18 03:20:01 vhost01 kernel: pciehp
0000:00:1c.0:pcie04: Card present on Slot(0)
Sep 18 03:20:01 vhost01 kernel: pciehp 0000:00:1c.0:pcie04: Card present on Slot(0)
Sep 18 03:20:01 vhost01 kernel: pciehp 0000:00:1c.0:pcie04: Card present on Slot(0)
Sep 18 03:20:02 vhost01 kernel: pciehp 0000:00:1c.0:pcie04: Card not present on Slot(0)
Sep 18 03:20:02 vhost01 kernel: pciehp 0000:00:1c.0:pcie04: Card present on Slot(0)
Sep 18 03:20:02 vhost01 kernel: pciehp 0000:00:1c.0:pcie04: Card not present on Slot(0)
Sep 18 03:20:02 vhost01 kernel: pciehp 0000:00:1c.0:pcie04: Card present on Slot(0)
Sep 18 03:20:02 vhost01 kernel: pciehp 0000:00:1c.0:pcie04: Card not present on Slot(0)
Sep 18 03:20:02 vhost01 kernel: pcieport 0000:00:1c.0: PCI bridge to
[bus 01-01]
Sep 18 03:20:02 vhost01 kernel: pcieport 0000:00:1c.0: bridge window
[io 0xe000-0xefff]
Sep 18 03:20:01 vhost01 kernel: pciehp 0000:00:1c.0:pcie04: Card present on Slot(0)
Sep 18 03:20:02 vhost01 kernel: pciehp 0000:00:1c.0:pcie04: Card not present on Slot(0)
Sep 18 03:20:02 vhost01 kernel: pciehp 0000:00:1c.0:pcie04: Card present on Slot(0)
Sep 18 03:20:02 vhost01 kernel: pciehp 0000:00:1c.0:pcie04: Card not present on Slot(0)
Sep 18 03:20:02 vhost01 kernel: pciehp 0000:00:1c.0:pcie04: Card present on Slot(0)
Sep 18 03:20:02 vhost01 kernel: pciehp 0000:00:1c.0:pcie04: Card not present on Slot(0)
Sep 18 03:20:02 vhost01 kernel: pcieport 0000:00:1c.0: PCI bridge to
[bus 01-01]
Sep 18 03:20:02 vhost01 kernel: pcieport 0000:00:1c.0: bridge window
[io 0xe000-0xefff]
Sep 18 03:20:02 vhost01 kernel: pcieport 0000:00:1c.0: bridge window
[mem 0xd0800000-0xd08fffff]
Sep 18 03:20:02 vhost01 kernel: pcieport 0000:00:1c.0: bridge window
[mem 0xd0a00000-0xd0cfffff 64bit pref]
Sep 18 03:20:02 vhost01 kernel: pci 0000:01:00.0: no hotplug settings from platform Sep 18 03:20:02 vhost01 kernel: pci 0000:01:00.0: using default PCI
settings Sep 18 03:20:02 vhost01 kernel: r8168 Gigabit Ethernet driver
8.040.00-NAPI loaded Sep 18 03:20:02 vhost01 kernel: r8168 0000:01:00.0: PCI INT ? -> GSI
18 (level, low) -> IRQ 18

These messages are generated ceaselessly.

Research reveals that this error is possibly related to some sort of driver incompatibility involving Realtek chip sets.

However, I do not seem to have this hardware installed on this host:

lspci
00:00.0 Host bridge: Intel Corporation 4 Series Chipset DRAM
Controller (rev 03)
00:02.0 VGA compatible controller: Intel Corporation 4 Series Chipset Integrated Graphics Controller (rev 03)
00:02.1 Display controller: Intel Corporation 4 Series Chipset Integrated Graphics Controller (rev 03)
00:03.0 Communication controller: Intel Corporation 4 Series Chipset HECI Controller (rev 03)
00:19.0 Ethernet controller: Intel Corporation 82567V-2 Gigabit Network Connection
00:1a.0 USB controller: Intel Corporation 82801JI (ICH10 Family) USB
UHCI Controller #4
00:1a.1 USB controller: Intel Corporation 82801JI (ICH10 Family) USB
UHCI Controller #5
00:1a.2 USB controller: Intel Corporation 82801JI (ICH10 Family) USB
UHCI Controller #6
00:1a.7 USB controller: Intel Corporation 82801JI (ICH10 Family) USB2
EHCI Controller #2
00:1b.0 Audio device: Intel Corporation 82801JI (ICH10 Family) HD
Audio Controller
00:1c.0 PCI bridge: Intel Corporation 82801JI (ICH10 Family) PCI
Express Root Port 1
00:1c.1 PCI bridge: Intel Corporation 82801JI (ICH10 Family) PCI
Express Port 2
00:1c.2 PCI bridge: Intel Corporation 82801JI (ICH10 Family) PCI
Express Root Port 3
00:1c.3 PCI bridge: Intel Corporation 82801JI (ICH10 Family) PCI
Express Root Port 4
00:1d.0 USB controller: Intel Corporation 82801JI (ICH10 Family) USB
UHCI Controller #1
00:1d.1 USB controller: Intel Corporation 82801JI (ICH10 Family) USB
UHCI Controller #2
00:1d.2 USB controller: Intel Corporation 82801JI (ICH10 Family) USB
UHCI Controller #3
00:1d.7 USB controller: Intel Corporation 82801JI (ICH10 Family) USB2
EHCI Controller #1
00:1e.0 PCI bridge: Intel Corporation 82801 PCI Bridge (rev 90)
00:1f.0 ISA bridge: Intel Corporation 82801JIB (ICH10) LPC Interface Controller
00:1f.2 IDE interface: Intel Corporation 82801JI (ICH10 Family) 4 port SATA IDE Controller #1
00:1f.3 SMBus: Intel Corporation 82801JI (ICH10 Family) SMBus Controller
00:1f.5 IDE interface: Intel Corporation 82801JI (ICH10 Family) 2 port SATA IDE Controller #2
02:00.0 PCI bridge: PLX Technology, Inc. PEX8112 x1 Lane PCI
Express-to-PCI Bridge (rev aa)
03:00.0 Serial controller: Oxford Semiconductor Ltd OX16PCI954 (Quad
16950 UART) function 0 (Uart)
03:00.1 Parallel controller: Oxford Semiconductor Ltd OX16PCI954 (Quad
16950 UART) function 0 (Disabled)
04:00.0 IDE interface: Marvell Technology Group Ltd. 88SE6101/6102
single-port PATA133 interface (rev b2)
05:00.0 FireWire (IEEE 1394): VIA Technologies, Inc. VT6315 Series Firewire Controller

lshw -businfo Bus info Device Class Description
=======================================================. . .
memory 32KiB L1 cache
memory 2MiB L2 cache
memory 16GiB System Memory
memory 4GiB DIMM DDR2
Synchronous 800 MHz (1.2 n
memory 4GiB DIMM DDR2
Synchronous 800 MHz (1.2 n
memory 4GiB DIMM DDR2
Synchronous 800 MHz (1.2 n
memory 4GiB DIMM DDR2
Synchronous 800 MHz (1.2 n pci@0000:00:00.0 bridge 4 Series Chipset DRAM
Controller pci@0000:00:02.0 display 4 Series Chipset Integrated Graphics Cont pci@0000:00:02.1 display 4 Series Chipset Integrated Graphics Cont pci@0000:00:03.0 communication 4 Series Chipset HECI
Controller pci@0000:00:19.0 eth0 network 82567V-2 Gigabit Network Connection pci@0000:00:1a.0 bus 82801JI (ICH10 Family)
USB UHCI Controlle usb@3 usb3 bus UHCI Host Controller pci@0000:00:1a.1 bus 82801JI (ICH10 Family)
USB UHCI Controlle usb@4 usb4 bus UHCI Host Controller pci@0000:00:1a.2 bus 82801JI (ICH10 Family)
USB UHCI Controlle usb@5 usb5 bus UHCI Host Controller pci@0000:00:1a.7 bus 82801JI (ICH10 Family)
USB2 EHCI Controll usb@1 usb1 bus EHCI Host Controller pci@0000:00:1b.0 multimedia 82801JI (ICH10 Family) HD
Audio Controlle pci@0000:00:1c.0 bridge 82801JI (ICH10 Family)
PCI Express Root P
pci@0000:00:1c.1 bridge 82801JI (ICH10 Family)
PCI Express Port 2
pci@0000:02:00.0 bridge PEX8112 x1 Lane PCI
Express-to-PCI Bridge pci@0000:03:00.0 communication OX16PCI954 (Quad 16950
UART) function 0 (
pci@0000:03:00.1 communication OX16PCI954 (Quad 16950
UART) function 0 (
pci@0000:00:1c.2 bridge 82801JI (ICH10 Family)
PCI Express Root P
pci@0000:04:00.0 storage 88SE6101/6102 single-port PATA133 interfa pci@0000:00:1c.3 bridge 82801JI (ICH10 Family)
PCI Express Root P
pci@0000:05:00.0 bus VT6315 Series Firewire Controller pci@0000:00:1d.0 bus 82801JI (ICH10 Family)
USB UHCI Controlle usb@6 usb6 bus UHCI Host Controller pci@0000:00:1d.1 bus 82801JI (ICH10 Family)
USB UHCI Controlle usb@7 usb7 bus UHCI Host Controller pci@0000:00:1d.2 bus 82801JI (ICH10 Family)
USB UHCI Controlle usb@8 usb8 bus UHCI Host Controller pci@0000:00:1d.7 bus 82801JI (ICH10 Family)
USB2 EHCI Controll usb@2 usb2 bus EHCI Host Controller pci@0000:00:1e.0 bridge 82801 PCI Bridge pci@0000:00:1f.0 bridge 82801JIB (ICH10) LPC
Interface Controller pci@0000:00:1f.2 scsi2 storage 82801JI (ICH10 Family) 4
port SATA IDE Co scsi@2:0.0.0 /dev/cdrom disk DVDRAM GH20NS10
scsi@3:0.0.0 /dev/sda disk 1TB ST31000524AS
scsi@3:0.0.0,1 /dev/sda1 volume 500MiB EXT4 volume scsi@3:0.0.0,2 /dev/sda2 volume 931GiB Linux LVM Physical Volume partitio pci@0000:00:1f.3 bus 82801JI (ICH10 Family)
SMBus Controller pci@0000:00:1f.5 storage 82801JI (ICH10 Family) 2
port SATA IDE Co

Can anyone shed any light on this problem? The system in question has been running some years and is only lacking the most recent updates.

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