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| author | David S. Miller <davem@davemloft.net> | 2005-08-17 14:57:30 -0700 |
|---|---|---|
| committer | David S. Miller <davem@sunset.davemloft.net> | 2005-08-29 16:01:54 -0700 |
| commit | d179cd12928443f3ec29cfbc3567439644bd0afc (patch) | |
| tree | 0bfc57e73f0bf9f7bb9d5c8ce7d3d5afe550f94e /include/net/sock.h | |
| parent | e92ae93a8aa66aea12935420cb22d4df1c18d023 (diff) | |
| download | lwn-d179cd12928443f3ec29cfbc3567439644bd0afc.tar.gz lwn-d179cd12928443f3ec29cfbc3567439644bd0afc.zip | |
[NET]: Implement SKB fast cloning.
Protocols that make extensive use of SKB cloning,
for example TCP, eat at least 2 allocations per
packet sent as a result.
To cut the kmalloc() count in half, we implement
a pre-allocation scheme wherein we allocate
2 sk_buff objects in advance, then use a simple
reference count to free up the memory at the
correct time.
Based upon an initial patch by Thomas Graf and
suggestions from Herbert Xu.
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/net/sock.h')
| -rw-r--r-- | include/net/sock.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/include/net/sock.h b/include/net/sock.h index 14183883e8e6..d57aece9492c 100644 --- a/include/net/sock.h +++ b/include/net/sock.h @@ -1200,7 +1200,7 @@ static inline struct sk_buff *sk_stream_alloc_pskb(struct sock *sk, int hdr_len; hdr_len = SKB_DATA_ALIGN(sk->sk_prot->max_header); - skb = alloc_skb(size + hdr_len, gfp); + skb = alloc_skb_fclone(size + hdr_len, gfp); if (skb) { skb->truesize += mem; if (sk->sk_forward_alloc >= (int)skb->truesize || |