2.6.32-longterm review patch. If anyone has any objections, please let us know.
------------------ From: Krishna Kumar <[email protected]> commit 068a2de57ddf4f472e32e7af868613c574ad1d88 upstream. Non-GSO code drops dst entry for performance reasons, but the same is missing for GSO code. Drop dst while cache-hot for GSO case too. Signed-off-by: Krishna Kumar <[email protected]> Acked-by: Eric Dumazet <[email protected]> Signed-off-by: David S. Miller <[email protected]> Signed-off-by: Andrey Vagin <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]> --- net/core/dev.c | 8 ++++++++ 1 file changed, 8 insertions(+) --- a/net/core/dev.c +++ b/net/core/dev.c @@ -1747,6 +1747,14 @@ gso: skb->next = nskb->next; nskb->next = NULL; + + /* + * If device doesnt need nskb->dst, release it right now while + * its hot in this cpu cache + */ + if (dev->priv_flags & IFF_XMIT_DST_RELEASE) + skb_dst_drop(nskb); + rc = ops->ndo_start_xmit(nskb, dev); if (unlikely(rc != NETDEV_TX_OK)) { nskb->next = skb->next; _______________________________________________ stable mailing list [email protected] http://linux.kernel.org/mailman/listinfo/stable
