Public bug reported:
After I've upgraded kernel to 2.6.31 (Ubuntu build) at my linux-box with
Intel 82574L NIC I saw that Jumbo frames doesn't working at all.
# ifconfig eth0 mtu 4000
SIOCSIFMTU: Invalid argument
# lspci | grep Network
02:00.0 Ethernet controller: Intel Corporation 82574L Gigabit Network Connection
03:00.0 Ethernet controller: Intel Corporation 82574L Gigabit Network Connection
I've figured out that this is a regression comparing to 2.6.28 kernel.
So, I've checked e1000e driver that handle 82574L NIC and found a bug.
This problem seems to affect only 82574 chip. I wrote patch to fix this
bug, it's in attachment.
** Affects: linux (Ubuntu)
Importance: Undecided
Status: New
** Tags: e1000e frames jumbo linux-2.6.31
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[Regression] Jumbo frames doesn't work with Intel 82574L NIC
https://bugs.launchpad.net/bugs/445572
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