Re: [Xen-devel] [PATCH net-next V3 1/3] xen-netback: split event channels support for Xen backend driver

[Wei Liu <wei.liu2@xxxxxxxxxx>]

On Mon, Jun 24, 2013 at 10:48:25AM +0100, Jan Beulich wrote:
> >>> On 22.05.13 at 18:34, Wei Liu <wei.liu2@xxxxxxxxxx> wrote:
> > Netback and netfront only use one event channel to do TX / RX notification,
> > which may cause unnecessary wake-up of processing routines. This patch adds 
> > a
> > new feature called feature-split-event-channels to netback, enabling it to
> > handle TX and RX events separately.
> > 
> > Netback will use tx_irq to notify guest for TX completion, rx_irq for RX
> > notification.
> 
> While I can see the benefit for the frontend, does this really make
> a lot of a difference to the backend considering that both rx and tx
> handling get done on the same thread anyway?
> 

Not for now. But I'm working on separating the backend handling routines.

So if you're thinking about backporting, I don't think this is the
material.


Wei.

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