Re: [Xen-devel] [PATCH 5/7] xen-netfront: reduce gso_max_size to account for ethernet header

[Wei Liu <wei.liu2@xxxxxxxxxx>]

On Tue, Apr 09, 2013 at 12:07:33PM +0100, Wei Liu wrote:
> The maximum packet including ethernet header that can be handled by netfront /
> netback wire format is 65535. Reduce gso_max_size accordingly.
> 
> Drop skb and print warning when skb->len > 65535. This can 1) save the effort
> to send malformed packet to netback, 2) help spotting misconfiguration of
> netfront in the future.
> 

Any opinion on how much space should be reserved? From a previous thread
Ben seemed to suggest 90 (Ethernet + VLAN tag + IPv6 + TCP + timestamp
option = 90 bytes).


Wei.

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