Re: [Bugme-new] [Bug 40572] New: Intel Gigabit Ethernet 82576 50% packet loss after reboot

(switched to email.  Please respond via emailed reply-to-all, not via the
bugzilla web interface).

On Fri, 5 Aug 2011 07:07:05 GMT
bugzilla-daemon@bugzilla.kernel.org wrote:

https://bugzilla.kernel.org/show_bug.cgi?id=40572

           Summary: Intel Gigabit Ethernet 82576 50% packet loss after
                    reboot
           Product: Drivers
           Version: 2.5
    Kernel Version: 3.0
          Platform: All
        OS/Version: Linux
              Tree: Mainline
            Status: NEW
          Severity: blocking
          Priority: P1
         Component: Network
        AssignedTo: drivers_network@kernel-bugs.osdl.org
        ReportedBy: vojcik@gmail.com
        Regression: No

I'll change this to "yes".

Hi, 

I have strange problem with Intel dualport Gigabit ehternet card.
Problem appears after 3rd - 5th reboot.

If you ping or make any network traffic you get 50% packet loss. No error
messages in logs.
When you make reboot all is ok in next few reboots.

We have eliminated network problems like switches, cables etc. It's software
related.

It looks like in kernel 2.6.37 we have the same problem but in 2.6.28.6
everything looks fine.

I attach some files for additional information

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On 08/23/2011 02:30 PM, Andrew Morton wrote:

(switched to email.  Please respond via emailed reply-to-all, not via the
bugzilla web interface).

On Fri, 5 Aug 2011 07:07:05 GMT
bugzilla-daemon@bugzilla.kernel.org wrote:

quoted

https://bugzilla.kernel.org/show_bug.cgi?id=40572

            Summary: Intel Gigabit Ethernet 82576 50% packet loss after
                     reboot
            Product: Drivers
            Version: 2.5
     Kernel Version: 3.0
           Platform: All
         OS/Version: Linux
               Tree: Mainline
             Status: NEW
           Severity: blocking
           Priority: P1
          Component: Network
         AssignedTo: drivers_network@kernel-bugs.osdl.org
         ReportedBy: vojcik@gmail.com
         Regression: No

I'll change this to "yes".

quoted

Hi,

I have strange problem with Intel dualport Gigabit ehternet card.
Problem appears after 3rd - 5th reboot.

If you ping or make any network traffic you get 50% packet loss. No error
messages in logs.
When you make reboot all is ok in next few reboots.

We have eliminated network problems like switches, cables etc. It's software
related.

It looks like in kernel 2.6.37 we have the same problem but in 2.6.28.6
everything looks fine.

I attach some files for additional information

This type of issue is typically a sign of a hardware problem.  I would recommend doing an lspci -vvv for the device in both the working and the non-working cases to see if there is any difference between the two.

One thing we have seen in the past is an issue where the PCIe will not link at x4 in all cases and will sometimes link at only x1.  When this occurs the device does not have enough PCIe bandwidth to handle heavy workloads.  You might want to try either reseating the network adapter into the slot or moving it from one PCIe slot to another in the system as it is possible the PCIe slot it is in may have an issue with one ore more of the PCIe lanes.

Thanks,

Alex