[ofa-general] Re: [PATCHv2] IB/ipoib: S/G and HW checksum support

[Michael S. Tsirkin]

> Quoting James Lentini <jlentini at netapp.com>:
> Subject: Re: [PATCHv2] IB/ipoib: S/G and HW checksum support
> 
> 
> 
> On Tue, 4 Sep 2007, Jason Gunthorpe wrote:
> 
> > On Tue, Sep 04, 2007 at 12:11:33PM +0300, Michael S. Tsirkin wrote:
> > 
> > > I know some people find this approach controversial,
> > > but from my perspective, this is not worse than e.g.
> > > SDP which does not have SW checksums pretty much by design.
> > 
> > This would be alot better in my mind of the option was negotiated as
> > part of the CM setup process. Otherwise this becomes a network wide
> > all or nothing kind of feature..
> > 
> > What if the RXing Linux IB side is acting as a forwarder to ethernet?
> > It will forward corrupt packets if this option is set, right?
> 
> So this break all gateway devices?

It won't. The gateway will calculate the checksums.

> How would packets be routed with this change?

As usual.

-- 
MST