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| author | Eric Dumazet <edumazet@google.com> | 2014-10-03 20:59:19 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2014-10-06 00:37:30 -0400 |
| commit | bec3cfdca36bf43cfa3751ad7b56db1a307e0760 (patch) | |
| tree | d9c2d8352b0cc41d43dc23b7a7eafdac6758aeb3 /net/core/skbuff.c | |
| parent | 45d9cc7c609680e921060d3eb4e399043eb5e4be (diff) | |
| download | linux-bec3cfdca36bf43cfa3751ad7b56db1a307e0760.tar.gz linux-bec3cfdca36bf43cfa3751ad7b56db1a307e0760.tar.bz2 linux-bec3cfdca36bf43cfa3751ad7b56db1a307e0760.zip | |
net: skb_segment() provides list head and tail
Its unfortunate we have to walk again skb list to find the tail
after segmentation, even if data is probably hot in cpu caches.
skb_segment() can store the tail of the list into segs->prev,
and validate_xmit_skb_list() can immediately get the tail.
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/core/skbuff.c')
| -rw-r--r-- | net/core/skbuff.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/net/core/skbuff.c b/net/core/skbuff.c index 9a423e2c5766..7b3df0d518ab 100644 --- a/net/core/skbuff.c +++ b/net/core/skbuff.c @@ -3083,6 +3083,11 @@ perform_csum_check: } } while ((offset += len) < head_skb->len); + /* Some callers want to get the end of the list. + * Put it in segs->prev to avoid walking the list. + * (see validate_xmit_skb_list() for example) + */ + segs->prev = tail; return segs; err: |