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Re: PCIe debugging error messages - kern.log



On Mon, 2012-08-06 at 15:24 -0500, Andrew Peng wrote:
> I've been working with the Intel E1000 development team in trying to
> find the cause of a hardware hang in my kern.log. They suggested
> contacting the Debian User list for extra help, whom suggested that I
> ask the Kernel list to see if I could get any insight.
> 
> This is the error in my kern.log:
> 
> Jul 24 02:49:45 gaia kernel: [806292.204500] e1000e 0000:02:00.0:
> eth1: Detected Hardware Unit Hang:
[...]
> One of the steps to find the cause of this is to enable extended error
> reporting by using ethtool:
> sudo ethtool -s eth1 msglvl 0x2c01
> 
> This will tell the driver to dump extended debugging (a PCIe Ring
> Dump) info to the kernel log with another error is detected. However,
> after enabling this extended logging, the next time an error occurs, I
> still don't get the debug dump in the kern.log. I get basically the
> same info as above.
>
> Is there anything Debian specific that would cause this to not get
> logged?
[...]

The ring dump is only shown in case the driver resets the chip, and it
doesn't do that in the case of Hardware Unit Hang.  So I think whichever
developer told you this was confused.

Ben.

-- 
Ben Hutchings
I say we take off; nuke the site from orbit.  It's the only way to be sure.

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