Re: r8169: jumbo frames
From: Francois Romieu <romieu@fr.zoreil.com>
Date: 2007-09-03 21:01:38
Shane [off-list ref] : [...]
Just wanted to report that when setting a mtu of 4074, I'm getting slow Samba performance with an r8169 based NIC even with the fix for this posted here applied. all dmesg shows is: NETDEV WATCHDOG: eth0: transmit timed out
It is a bit terse: - which kernel ? - which fix exactly (Message-Id or URL) ? The one I sent the 29 of 08/2007 or something else ? - which chipset (lspci -vvx) ? Fwiw, I have rediffed the patchkit against 2.6.23-rc5. See: http://www.fr.zoreil.com/people/francois/misc/20070903-2.6.23-rc5-r8169-test.patch or: http://www.fr.zoreil.com/linux/kernel/2.6.x/2.6.23-rc5/r8169-20070903/ If you have not done so already, I would appreciate that you try to reproduce the problem with a 1500 bytes MTU with/without the aforementioned patch.
The mtu value is due to Windows workstations which support this value and 9k MTU but the r8169 doesn't appear to like 9k although that's where I'd like it to be on this network.
The 8169 will not fly above 7200, be it on Linux or Windows. :o/ -- Ueimor