Hi Jeff, On Mon, 28 Nov 2016 14:26:02 -0800 Jeff Kirsher <jeffrey.t.kirs...@intel.com> wrote: > > On Mon, 2016-11-28 at 10:42 -0500, Alexander Duyck wrote: > > When I implemented the GSO partial support in the Intel drivers I was > > using > > lco_csum to compute the checksum that we needed to plug into the IPv4 > > checksum field in order to cancel out the data that was not a part of the > > IPv4 header. However this didn't take into account that the transport > > offset might be pointing to the inner transport header. > > > > Instead of using lco_csum I have just coded around it so that we can use > > the outer IP header plus the IP header length to determine where we need > > to > > start our checksum and then just call csum_partial ourselves. > > > > This should fix the SIT issue reported on igb interfaces as well as > > simliar > > issues that would pop up on other Intel NICs. > > > > --- > > > > Alexander Duyck (2): > > igb/igbvf: Don't use lco_csum to compute IPv4 checksum > > ixgbe/ixgbevf: Don't use lco_csum to compute IPv4 checksum > > Stephen, I have applied Alex's patches to my net-queue tree. Can you > confirm they resolve the bug seen?
Its a bit tricky because the origin problem only happens on my production server (ozlabs.org), but I will see if I can manage to just remove and reload the driver ... though, the server is running a 4.7.8 kernel and I am wondering how well these patches will apply? -- Cheers, Stephen Rothwell
