RE: [Xen-devel] [PATCH] Network Checksum Removal

["Ian Pratt" <m+Ian.Pratt@xxxxxxxxxxxx>]

> > I'm surprised there's much benefit to csum offload on the 
> tx side at 
> > all as its almost always done as part of a copy.
> 
> Why?  The tx checksumming is just as expensive as the rx checksumming.

[Nivedita has already posted a nice explanation.]
 

> There is a patch on netdev which can decrease the CPU load of 
> bridging.  
> specifically, it allows the bridge device to take advantage 
> of the network device features (like hardware checksum 
> offload).  Stephen Hemminger says it should go in the 2.6.13 kernel.  

Please can you post it as a patch so that we can include it in our
2.6.11 patches directory.

With the patch, csum offload will be much more interesting in the rx
case 

Thanks,
Ian

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