Re: [Xen-devel] [PATCH 1/3] xen-netback: remove page tracking facility

[David Vrabel <david.vrabel@xxxxxxxxxx>]

On 27/05/13 12:29, Wei Liu wrote:
> The data flow from DomU to DomU on the same host:
> 
> With tracking facility:
> 
>        copy
> DomU --------> Dom0          DomU
>  |                            ^
>  |____________________________|
>              copy
> 
> In other words, we can always copy page from Dom0, thus removing the
> need for a tracking facility.
> 
>        copy           copy
> DomU --------> Dom0 -------> DomU
> 
> Simple iperf test shows no performance regression (obviously we do two
> copy's anyway):
> 
>   W/  tracking: ~5.3Gb/s
>   W/o tracking: ~5.4Gb/s
> 
> Signed-off-by: Wei Liu <wei.liu2@xxxxxxxxxx>
> ---
>  drivers/net/xen-netback/netback.c |   77 
> +------------------------------------
>  1 file changed, 2 insertions(+), 75 deletions(-)

Nice! This is the sort of patch I like.

David

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