linux-kernel - [2.6.27-rc2.git1] (Fedora snapshot) Realtek gigE network driver showing bogus packet drops

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Message-Id: <200808262059.57667.shawn.starr@rogers.com>
Date:	Tue, 26 Aug 2008 20:59:56 -0400
From:	Shawn Starr <shawn.starr@...ers.com>
To:	linux-kernel@...r.kernel.org
Subject: [2.6.27-rc2.git1] (Fedora snapshot) Realtek gigE network driver showing bogus packet drops

This may or may not be due to a Fedora patch.

Motherboard: ASRock 4Core1600Twins-P35

Ifconfig:
eth0      Link encap:Ethernet  HWaddr 00:19:66:XX:XX:XX
          inet addr:192.168.XX.XX  Bcast:192.168.XX.XX  Mask:255.255.255.0                       
          inet6 addr: fe80::219:66ff:fe64:1c68/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:609519 errors:0 dropped:424695074957 overruns:0 frame:0
          TX packets:307400 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:869139403 (828.8 MiB)  TX bytes:20560737 (19.6 MiB)
          Interrupt:17

The dropped count increments even with no traffic. The machine has not been suspended/resumed. Anyone else noticed this?

Interrupt information:

           CPU0       CPU1       CPU2       CPU3
  0:         53          1          0          0   IO-APIC-edge      timer
  1:        119         51         17          8   IO-APIC-edge      i8042
  8:          1          0          0          0   IO-APIC-edge      rtc0
  9:          0          0          0          0   IO-APIC-fasteoi   acpi
 12:         27         28         28         29   IO-APIC-edge      i8042
 16:        657        515       5440       3747   IO-APIC-fasteoi uhci_hcd:usb3, pata_jmicron
 17:          6       4693          4     912071   IO-APIC-fasteoi   HDA Intel, eth0
 18:          0          0          0          0   IO-APIC-fasteoi   ehci_hcd:usb1, uhci_hcd:usb8
 19:     119224     237091       2558       2247   IO-APIC-fasteoi   uhci_hcd:usb5, uhci_hcd:usb7, ahci
 21:          0          0          0          0   IO-APIC-fasteoi   uhci_hcd:usb4
 22:        955         53        795         97   IO-APIC-fasteoi   HDA Intel, eth1
 23:          1          1          0          0   IO-APIC-fasteoi   ehci_hcd:usb2, uhci_hcd:usb6
NMI:          0          0          0          0   Non-maskable interrupts
LOC:     882410     796648     341746     271431   Local timer interrupts
RES:       3924       4203        924       1254   Rescheduling interrupts
CAL:       4496       4541       1431       1798   function call interrupts
TLB:      11834      12648       1758       3854   TLB shootdowns
TRM:          0          0          0          0   Thermal event interrupts
THR:          0          0          0          0   Threshold APIC interrupts
SPU:          0          0          0          0   Spurious interrupts

Relevant IOport info:

a000-afff : PCI Bus 0000:01
  a800-a8ff : 0000:01:00.0
    a800-a8ff : r8169

Memory range:
cdf00000-cdffffff : PCI Bus 0000:01
  cdfe0000-cdfeffff : 0000:01:00.0
    cdfe0000-cdfeffff : r8169
  cdfff000-cdffffff : 0000:01:00.0
    cdfff000-cdffffff : r8169

01:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168B PCI Express Gigabit Ethernet controller (rev 02)                                                                       
        Subsystem: ASRock Incorporation Device 8168                                              
        Flags: bus master, fast devsel, latency 0, IRQ 17                                        
        I/O ports at a800 [size=256]                                                             
        Memory at cdfff000 (64-bit, prefetchable) [size=4K]                                      
        Memory at cdfe0000 (64-bit, prefetchable) [size=64K]                                     
        Expansion ROM at fdef0000 [disabled] [size=64K]                                          
        Capabilities: [40] Power Management version 3                                            
        Capabilities: [50] Message Signalled Interrupts: Mask- 64bit+ Queue=0/1 Enable-          
        Capabilities: [70] Express Endpoint, MSI 01                                              
        Capabilities: [b0] MSI-X: Enable- Mask- TabSize=2                                        
        Capabilities: [d0] Vital Product Data <?>                                                
        Capabilities: [100] Advanced Error Reporting <?>                                         
        Capabilities: [140] Virtual Channel <?>                                                  
        Capabilities: [160] Device Serial Number 00-e0-4c-68-12-34-56-78                         
        Kernel driver in use: r8169                                                              
        Kernel modules: r8169        

dmesg attached (these things are growing bigger and bigger :-)

View attachment "dmesg" of type "text/plain" (45185 bytes)