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| author | Herbert Xu <herbert@gondor.apana.org.au> | 2009-05-26 18:50:27 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2009-05-27 03:26:01 -0700 |
| commit | 7489594cb249aeb178287c9a43a9e4f366044259 (patch) | |
| tree | 3989b000550aa061d6cd222a83c12c62c1cc0182 /net/core/dev.c | |
| parent | 30a3ae30c775e2723f86ef70746ad3cb4404a4c9 (diff) | |
| download | kernel-crypto-7489594cb249aeb178287c9a43a9e4f366044259.tar.gz kernel-crypto-7489594cb249aeb178287c9a43a9e4f366044259.tar.xz kernel-crypto-7489594cb249aeb178287c9a43a9e4f366044259.zip | |
gro: Optimise length comparison in skb_gro_header
By caching frag0_len, we can avoid checking both frag0 and the
length separately in skb_gro_header. This helps as skb_gro_header
is called four times per packet which amounts to a few million
times at 10Gb/s.
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/core/dev.c')
| -rw-r--r-- | net/core/dev.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/net/core/dev.c b/net/core/dev.c index f9d90c56b6f..b1722a2d1fb 100644 --- a/net/core/dev.c +++ b/net/core/dev.c @@ -2509,12 +2509,15 @@ void skb_gro_reset_offset(struct sk_buff *skb) { NAPI_GRO_CB(skb)->data_offset = 0; NAPI_GRO_CB(skb)->frag0 = NULL; + NAPI_GRO_CB(skb)->frag0_len = 0; if (skb->mac_header == skb->tail && - !PageHighMem(skb_shinfo(skb)->frags[0].page)) + !PageHighMem(skb_shinfo(skb)->frags[0].page)) { NAPI_GRO_CB(skb)->frag0 = page_address(skb_shinfo(skb)->frags[0].page) + skb_shinfo(skb)->frags[0].page_offset; + NAPI_GRO_CB(skb)->frag0_len = skb_shinfo(skb)->frags[0].size; + } } EXPORT_SYMBOL(skb_gro_reset_offset); |