Re: [Xen-devel] [PATCH net-next 0/2] xen-netback: Changes around carrier handling

[Zoltan Kiss <zoltan.kiss@xxxxxxxxxx>]

On 04/08/14 16:20, Zoltan Kiss wrote:
> This series starts using carrier off as a way to purge packets when the guest is
> not able (or willing) to receive them. It is a much faster way to get rid of
> packets waiting for an overwhelmed guest.
> The first patch changes current netback code where it relies currently on
> netif_carrier_ok.
> The second turns off the carrier if the guest times out on a queue, and only
> turn it on again if that queue (or queues) resurrects.
>
> Signed-off-by: Zoltan Kiss <zoltan.kiss@xxxxxxxxxx>
> Signed-off-by: David Vrabel <david.vrabel@xxxxxxxxxx>
> Cc: netdev@xxxxxxxxxxxxxxx
> Cc: linux-kernel@xxxxxxxxxxxxxxx
> Cc: xen-devel@xxxxxxxxxxxxxxxxxxxx
Sorry, I forgot to include v2 in the subject header, and the version 
history for the second patch:
v2:
- added a lot more comments
- fixing the bit checking in RX interrupt
- move out the bulk of the code from the main thread function into
  xenvif_rx_purge_event

Zoli

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