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| author | Herbert Xu <herbert@gondor.apana.org.au> | 2008-01-22 22:39:26 -0800 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2008-01-23 03:11:43 -0800 |
| commit | f945fa7ad9c12a3356a3de7fb2143ccc2f2c3bca (patch) | |
| tree | 2dd386474d0ab5e728af671c2b2eafdacc099f09 /net/ipv6/ip6_output.c | |
| parent | ff4b950277b6534caab2b2b956dba6ce29757551 (diff) | |
| download | lwn-f945fa7ad9c12a3356a3de7fb2143ccc2f2c3bca.tar.gz lwn-f945fa7ad9c12a3356a3de7fb2143ccc2f2c3bca.zip | |
[INET]: Fix truesize setting in ip_append_data
As it is ip_append_data only counts page fragments to the skb that
allocated it. As such it means that the first skb gets hit with a
4K charge even though it might have only used a fraction of it while
all subsequent skb's that use the same page gets away with no charge
at all.
This bug was exposed by the UDP accounting patch.
[ The wmem_alloc bumping needs to be moved with the truesize,
noticed by Takahiro Yasui. -DaveM ]
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv6/ip6_output.c')
| -rw-r--r-- | net/ipv6/ip6_output.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/net/ipv6/ip6_output.c b/net/ipv6/ip6_output.c index 6338a9c1aa14..3bef30e4a23d 100644 --- a/net/ipv6/ip6_output.c +++ b/net/ipv6/ip6_output.c @@ -1316,8 +1316,6 @@ alloc_new_skb: skb_fill_page_desc(skb, i, page, 0, 0); frag = &skb_shinfo(skb)->frags[i]; - skb->truesize += PAGE_SIZE; - atomic_add(PAGE_SIZE, &sk->sk_wmem_alloc); } else { err = -EMSGSIZE; goto error; @@ -1330,6 +1328,8 @@ alloc_new_skb: frag->size += copy; skb->len += copy; skb->data_len += copy; + skb->truesize += copy; + atomic_add(copy, &sk->sk_wmem_alloc); } offset += copy; length -= copy; |