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authorIan Campbell <Ian.Campbell@citrix.com>2012-01-05 07:13:39 (GMT)
committerDavid S. Miller <davem@davemloft.net>2012-01-05 19:01:21 (GMT)
commit9f42f126154786e6e76df513004800c8c633f020 (patch)
tree0f6247b0a7d804fbbace2d12429b7d80c3e7470e
parenteeca6688d6599c28bc449a45facb67d7f203be74 (diff)
downloadlinux-9f42f126154786e6e76df513004800c8c633f020.tar.xz
net: pack skb_shared_info more efficiently
nr_frags can be 8 bits since 256 is plenty of fragments. This allows it to be packed with tx_flags. Also by moving ip6_frag_id and dataref (both 4 bytes) next to each other we can avoid a hole between ip6_frag_id and frag_list on 64 bit systems. Signed-off-by: Ian Campbell <ian.campbell@citrix.com> Acked-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
-rw-r--r--include/linux/skbuff.h6
1 files changed, 3 insertions, 3 deletions
diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h
index f47f0c3..50db9b0 100644
--- a/include/linux/skbuff.h
+++ b/include/linux/skbuff.h
@@ -242,15 +242,15 @@ struct ubuf_info {
* the end of the header data, ie. at skb->end.
*/
struct skb_shared_info {
- unsigned short nr_frags;
+ unsigned char nr_frags;
+ __u8 tx_flags;
unsigned short gso_size;
/* Warning: this field is not always filled in (UFO)! */
unsigned short gso_segs;
unsigned short gso_type;
- __be32 ip6_frag_id;
- __u8 tx_flags;
struct sk_buff *frag_list;
struct skb_shared_hwtstamps hwtstamps;
+ __be32 ip6_frag_id;
/*
* Warning : all fields before dataref are cleared in __alloc_skb()