RX performance degradation with e1000e in Linux 2.6.31 / F12

[Michael Cronenworth]

Kelvin Ku wrote:
> After upgrading from Linux 2.6.30 (Fedora Core 11) to 2.6.31 (F12), I am
> experiencing significant packet loss on an Intel 82574L NIC running on the
> e1000e driver. I was not experiencing this with kernel 2.6.30. I notice 2.6.30
> uses e1000e version 0.3.3.4-k4 whereas 2.6.31 uses version 1.0.2-k2.

And the driver version would be the significance. It appears there are 
(very) serious issues with the e1000e driver and the 82574L chip. I'm 
having to use 2.6.30 on a F12 server with an 82574L to have network 
connectivity at all. The issue has been reported[1] and it is being 
investigated. We had a hard time convincing Intel it wasn't a 
motherboard manufacturer problem.

[1] 
http://sourceforge.net/tracker/?func=detail&aid=2908463&group_id=42302&atid=447449