Re: [Xen-devel] [PATCHv2 net-next] xen-netback: remove unconditional __pskb_pull_tail() in guest Tx path

[David Vrabel <david.vrabel@xxxxxxxxxx>]

On 05/11/14 10:58, Ian Campbell wrote:
> Dropping netdev since this isn't relevant to them, adding Paul
> 
> On Wed, 2014-11-05 at 10:50 +0000, David Vrabel wrote:
>> - performance: Netback has already grant copied up-to 128 bytes from
>>   the first slot of a packet into the linear area. The first slot
>>   normally contain all the IPv4/IPv6 and TCP/UDP headers.
> 
> Does "normally" here include guests other than Linux? I thought Windows
> in particular was prone to splitting the headers into a frag per layer
> or thereabouts?

I'm not sure what guests Malcolm tested with.

David

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