On Mon, 2013-10-28 at 15:44 -0700, Michael Dalton wrote:
> The virtio_net driver's mergeable receive buffer allocator
> uses 4KB packet buffers. For MTU-sized traffic, SKB truesize
> is > 4KB but only ~1500 bytes of the buffer is used to store
> packet data, reducing the effective TCP window size
> substantially. This patch addresses the performance concerns
> with mergeable receive buffers by allocating MTU-sized packet
> buffers using page frag allocators. If more than MAX_SKB_FRAGS
> buffers are needed, the SKB frag_list is used.
>
> Signed-off-by: Michael Dalton <mwdalton@xxxxxxxxxx>
> ---
Signed-off-by: Eric Dumazet <edumazet@xxxxxxxxxx>
Daniel & Francesco, this should address the performance problem you
tried to address with ("tcp: rcvbuf autotuning improvements")
( http://www.spinics.net/lists/netdev/msg252642.html )
Thanks !
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