XEN: pciback.hide disabled?

[Gawain Lynch]

On Wed, 2006-06-21 at 21:29 +0300, Gilboa Davara wrote:
> Hello all,
> 
> I'm trying to dedicate a number of NICs on a Xen setup to the guest OS.
> It was advised (in the -users list) that I use the pciback.hide option
> to hide the NICs from the host.
> 
> I tried adding the pciback.hide command line option to the Xen0 kernel
> and got nothing. (Unknown boot option `pciback.hide=(xx:xx.x)':
> ignoring)
> After sifting through the kernel configuration I noticed that all FC5
> xen kernels (including latest -testing) disable the PCIBACK support.
> (CONFIG_XEN_PCIDEV_FRONTEND and CONFIG_XEN_PCIDEV_BACKEND)
> 
> Am I right? Do I need to enable these two to get pciback.hide working?
> Or am I barking at the wrong tree?
> 
> Thanks,
> Gilboa
> 

See https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=188771

There are some issues with emabling it, including security
considerations and it also breaks TCP checksums.  The latter can be
fixed by running `ethtool -K eth0 tx off`