On Thu, Dec 15, 2005 at 05:50:50PM +0100, Andi Kleen wrote:
> On Thu, Dec 15, 2005 at 11:40:08AM -0500, John W. Linville wrote:
> > On Thu, Dec 15, 2005 at 04:29:04PM +0100, Andi Kleen wrote:
> > >
> > > Hallo,
> > >
> > > When I boot a kernel with iommu=force (this forces all pci_map_sgs
> > > through the K8 aperture) and slab debugging on a Nforce4 x86-64
> > > system the network corrupts data very quickly. Even when just
> > > sshing somewhere ssh quickly aborts with MAC errors etc.
> > >
> > > Reverting only forcedeth.c to the one from 2.6.14 fixes the problem.
> >
> > There are several changes to that one since 2.6.14. In particular,
> > one labeled "forcedeth: add hardware tx checksumming" that was
> > committed on 9/21.
> >
> > You may want to try removing that patch? Let us know... :-)
>
> It's related to TSO. An #undef NETIF_F_TSO makes the driver work.
> Unfortunately the patch that was posted didn't fix it :/
Interesting... FWIW the FC4.netdev.6 kernel seems to be working fine
on (a yet-to-be-released box), which is an x86_64 (AMD) box w/
forcedeth hardware. The forcedeth.c in the FC4.netdev.6 kernel is
identical to what is currently in Linus's linux-2.6 GIT tree.
Perhaps there is a problem w/ the hardware you are using? Or...?
John
P.S. I know Fedora is not your thing. But if you are curious about
what might be in that kernel that is different from 2.6.15-rc5, then
you can find the source RPM under here:
http://people.redhat.com/linville/kernels/fedora-netdev/4/
--
John W. Linville
[EMAIL PROTECTED]
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