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authorEric Dumazet <eric.dumazet@gmail.com>2010-09-02 19:09:32 -0400
committerDavid S. Miller <davem@davemloft.net>2010-09-06 21:24:59 -0400
commit1fd63041c49c5c6ed1fe58b7bccc2de462d51e2b (patch)
treeaac2e108e2c8c545669bd9fe655f04ac026f5e15 /drivers/net
parent9d348af47656a65a697ff55a53daf294ea4d5662 (diff)
net: pskb_expand_head() optimization
pskb_expand_head() blindly takes references on fragments before calling skb_release_data(), potentially releasing these references. We can add a fast path, avoiding these atomic operations, if we own the last reference on skb->head. Based on a previous patch from David Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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