Re: [Ksummit-2005-discuss] Summary of 2005 Kernel Summit Proposed Topics

["David S. Miller" <davem@xxxxxxxxxxxxx>]

On Sat, 26 Mar 2005 23:05:30 -0800
Dmitry Yusupov <dmitry_yus@xxxxxxxxx> wrote:

> > During these gaps in time, you will need to keep your HW receive
> > ring populated with packets.
> 
> ethernet flow-control must take care this case.
> 
> If driver's replenish logic could mix alloc_skb/netif_rx and SKB
> recycling than pause frames should never happen even with gige+
> interfaces.

I don't see what the big deal is if pause frames
are generated when the system is low on atomic memory
and RX allocations thus fail.

SKB recycling doesn't get the user on the cpu faster
to receive the data.  I don't understand how you expect
the recycling to be guarenteed except perhaps as a special
case for iSCSI taking in the TCP packets in the ->data_ready()
callback.  In that case it's exactly that, a special case
hack, and not something generically useful at all.