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| author | Alexander Duyck <alexander.h.duyck@intel.com> | 2010-06-02 12:24:37 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2010-06-05 02:23:16 -0700 |
| commit | b78462ebc6a4ef9074aa80abebcdd470dc5f0ce0 (patch) | |
| tree | fba32dab1e3dca2c5bb5b7d73a64a77c2b6872e8 /include/linux/skbuff.h | |
| parent | 55c95e738da85373965cb03b4f975d0fd559865b (diff) | |
| download | lwn-b78462ebc6a4ef9074aa80abebcdd470dc5f0ce0.tar.gz lwn-b78462ebc6a4ef9074aa80abebcdd470dc5f0ce0.zip | |
skbuff: add check for non-linear to warn_if_lro and needs_linearize
We can avoid an unecessary cache miss by checking if the skb is non-linear
before accessing gso_size/gso_type in skb_warn_if_lro, the same can also be
done to avoid a cache miss on nr_frags if data_len is 0.
Signed-off-by: Alexander Duyck <alexander.h.duyck@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/linux/skbuff.h')
| -rw-r--r-- | include/linux/skbuff.h | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h index bf243fc54959..645e78d395fd 100644 --- a/include/linux/skbuff.h +++ b/include/linux/skbuff.h @@ -2129,7 +2129,8 @@ static inline bool skb_warn_if_lro(const struct sk_buff *skb) /* LRO sets gso_size but not gso_type, whereas if GSO is really * wanted then gso_type will be set. */ struct skb_shared_info *shinfo = skb_shinfo(skb); - if (shinfo->gso_size != 0 && unlikely(shinfo->gso_type == 0)) { + if (skb_is_nonlinear(skb) && shinfo->gso_size != 0 && + unlikely(shinfo->gso_type == 0)) { __skb_warn_lro_forwarding(skb); return true; } |