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authorEric Dumazet <edumazet@google.com>2012-09-27 23:29:05 +0400
committerDavid S. Miller <davem@davemloft.net>2012-10-02 01:01:46 +0400
commitc9e6bc644e557338221e75c242ab12c275a67d1b (patch)
treedea44a1edd85dccafc2d0973280d3a608d69eb02 /net
parent861b650101eb0c627d171eb18de81dddb93d395e (diff)
downloadlinux-c9e6bc644e557338221e75c242ab12c275a67d1b.tar.xz
net: add gro_cells infrastructure
This adds a new include file (include/net/gro_cells.h), to bring GRO (Generic Receive Offload) capability to tunnels, in a modular way. Because tunnels receive path is lockless, and GRO adds a serialization using a napi_struct, I chose to add an array of up to DEFAULT_MAX_NUM_RSS_QUEUES cells, so that multi queue devices wont be slowed down because of GRO layer. skb_get_rx_queue() is used as selector. In the future, we might add optional fanout capabilities, using rxhash for example. With help from Ben Hutchings who reminded me netif_get_num_default_rss_queues() function. Signed-off-by: Eric Dumazet <edumazet@google.com> Cc: Ben Hutchings <bhutchings@solarflare.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net')
-rw-r--r--net/core/dev.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/net/core/dev.c b/net/core/dev.c
index 3e645f3751bf..ba4bb118a756 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -2645,6 +2645,8 @@ EXPORT_SYMBOL(dev_queue_xmit);
=======================================================================*/
int netdev_max_backlog __read_mostly = 1000;
+EXPORT_SYMBOL(netdev_max_backlog);
+
int netdev_tstamp_prequeue __read_mostly = 1;
int netdev_budget __read_mostly = 300;
int weight_p __read_mostly = 64; /* old backlog weight */