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| author | Eric Dumazet <dada1@cosmosbay.com> | 2009-03-21 21:42:55 +0100 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2009-03-21 21:42:55 +0100 |
| commit | ed734a97c6a81b644bd648afd7a337deb0ccd7e5 (patch) | |
| tree | 2c030345bf9fb6ab6228d4757a96f9f7109fa60e | |
| parent | sctp: Clean up TEST_FRAME hacks. (diff) | |
| download | linux-ed734a97c6a81b644bd648afd7a337deb0ccd7e5.tar.xz linux-ed734a97c6a81b644bd648afd7a337deb0ccd7e5.zip | |
net: remove useless prefetch() call
There is no gain using prefetch() in dev_hard_start_xmit(), since
we already had to read ops->ndo_select_queue pointer in dev_pick_tx(),
and both pointers are probably located in the same cache line.
This prefetch call slows down fast path because of a stall in address
computation.
Signed-off-by: Eric Dumazet <dada1@cosmosbay.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | net/core/dev.c | 1 |
1 files changed, 0 insertions, 1 deletions
diff --git a/net/core/dev.c b/net/core/dev.c index fdb9973b82a6..052dd478d3e1 100644 --- a/net/core/dev.c +++ b/net/core/dev.c @@ -1670,7 +1670,6 @@ int dev_hard_start_xmit(struct sk_buff *skb, struct net_device *dev, const struct net_device_ops *ops = dev->netdev_ops; int rc; - prefetch(&dev->netdev_ops->ndo_start_xmit); if (likely(!skb->next)) { if (!list_empty(&ptype_all)) dev_queue_xmit_nit(skb, dev); |