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| author | Ian Campbell <Ian.Campbell@citrix.com> | 2012-01-05 07:13:39 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2012-01-05 14:01:21 -0500 |
| commit | 9f42f126154786e6e76df513004800c8c633f020 (patch) | |
| tree | 0f6247b0a7d804fbbace2d12429b7d80c3e7470e /include/linux/skbuff.h | |
| parent | eeca6688d6599c28bc449a45facb67d7f203be74 (diff) | |
| download | lwn-9f42f126154786e6e76df513004800c8c633f020.tar.gz lwn-9f42f126154786e6e76df513004800c8c633f020.zip | |
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>
Diffstat (limited to 'include/linux/skbuff.h')
| -rw-r--r-- | include/linux/skbuff.h | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h index f47f0c3939f2..50db9b04a552 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() |