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[Xen-devel] Re: RX_COPY_THRESHOLD in netfront
| To: | Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx> |
|---|---|
| Subject: | [Xen-devel] Re: RX_COPY_THRESHOLD in netfront |
| From: | Keir Fraser <Keir.Fraser@xxxxxxxxxxxx> |
| Date: | Sat, 12 Aug 2006 10:43:18 +0100 |
| Cc: | Xen Development Mailing List <xen-devel@xxxxxxxxxxxxxxxxxxx> |
| Delivery-date: | Sat, 12 Aug 2006 02:52:05 -0700 |
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| Thread-index: | Aca98712/CCE4CnmEduxlQANk04WTA== |
| Thread-topic: | RX_COPY_THRESHOLD in netfront |
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On 12/8/06 1:29 am, "Herbert Xu" <herbert@xxxxxxxxxxxxxxxxxxx> wrote: > I do concede that we're wasting effort in repeatedly initialising skb's > that we throw away in the case of jumbo packets. We can remove that > waste by maintaining our own list of unused skb's that we can simply > put back on the ring in network_alloc_rx_buffers without going through > alloc_skb again. If we're successfully allocating *whole pages* in network_alloc_rx_buffers(), I'd be surprised if we couldn't allocate a 256-byte skbuff in netif_poll(). On the other hand, just putting the skbuffs on the rx_batch queue is an easier change to make. -- Keir _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel |
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