On Tue, 22 May 2012 11:19:50 -0700 Stephen Hemminger <[email protected]> wrote:
> > > Begin forwarded message: > > Date: Tue, 22 May 2012 18:13:21 +0000 (UTC) > From: [email protected] > To: [email protected] > Subject: [Bug 43277] New: net/e1000e set mtu larger than 1500 fails > > > https://bugzilla.kernel.org/show_bug.cgi?id=43277 > > Summary: net/e1000e set mtu larger than 1500 fails > Product: Networking > Version: 2.5 > Kernel Version: 3.4 > Platform: All > OS/Version: Linux > Tree: Mainline > Status: NEW > Severity: normal > Priority: P1 > Component: IPV4 > AssignedTo: [email protected] > ReportedBy: [email protected] > Regression: Yes > > > In kernel 3.4 I can no longer use jumbo-frames with my e1000e network > interface. > > $ sudo ip link set eth1 mtu 9000 > RTNETLINK answers: Invalid argument I believe the problem is detected here. Check system console log (dmesg). The hardware does not allow receive hashing and checksum offload together in Jumbo mode. /* * IP payload checksum (enabled with jumbos/packet-split when * Rx checksum is enabled) and generation of RSS hash is * mutually exclusive in the hardware. */ if ((netdev->features & NETIF_F_RXCSUM) && (netdev->features & NETIF_F_RXHASH)) { e_err("Jumbo frames cannot be enabled when both receive checksum offload and receive hashing are enabled. Disable one of the receive offload features before enabling jumbos.\n"); return -EINVAL; } ------------------------------------------------------------------------------ Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ _______________________________________________ E1000-devel mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/e1000-devel To learn more about Intel® Ethernet, visit http://communities.intel.com/community/wired
