Bug#651914: linux-image-2.6.32-5-xen-amd64: Poor IPv6 performance from Xen guest; GSO-related?
On Tue, Dec 13, 2011 at 05:23:23AM +0000, Andy Smith wrote:
> What I'm noticing is the occasional incorrect checksum and "ICMPv6
> packet too big" messages seen above around 23:59:00.672905 and
> 23:59:01.240946 after a packet of length 2856. These do not occur
> on the server with the e1000e driver, where all the packets top out
> at 1428. They always occur on the two servers with the igb driver
> where the poor throughput is observed.
Ah, could this be a duplicate of #630730? That was fixed in
2.6.32-39 while the machine in question is running 2.6.32-34.
#630730 seems to suggest that the bug would also have affected
e1000e, though. Another machine running 2.6.32-34 and using driver
e1000e is fine..
Thanks,
Andy
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