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| author | Felix Fietkau <nbd@openwrt.org> | 2012-05-27 14:43:58 +0000 |
|---|---|---|
| committer | Felix Fietkau <nbd@openwrt.org> | 2012-05-27 14:43:58 +0000 |
| commit | 489514ce702e91e1977aae233877cf8b122a3e9e (patch) | |
| tree | 437afa2ce20c1a5e28af78144db40d717f81bc48 /target/linux/generic/patches-3.3/653-disable_netlink_trim.patch | |
| parent | b93700be90f086012e63655e63d167c25761f7f9 (diff) | |
| download | master-187ad058-489514ce702e91e1977aae233877cf8b122a3e9e.tar.gz master-187ad058-489514ce702e91e1977aae233877cf8b122a3e9e.tar.bz2 master-187ad058-489514ce702e91e1977aae233877cf8b122a3e9e.zip | |
kernel: add a few patches for avoiding unnecessary skb reallocations - significantly improves ethernet<->wireless performance with mac80211 based drivers
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@31886 3c298f89-4303-0410-b956-a3cf2f4a3e73
Diffstat (limited to 'target/linux/generic/patches-3.3/653-disable_netlink_trim.patch')
| -rw-r--r-- | target/linux/generic/patches-3.3/653-disable_netlink_trim.patch | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/target/linux/generic/patches-3.3/653-disable_netlink_trim.patch b/target/linux/generic/patches-3.3/653-disable_netlink_trim.patch new file mode 100644 index 0000000000..c6c7c75a9e --- /dev/null +++ b/target/linux/generic/patches-3.3/653-disable_netlink_trim.patch @@ -0,0 +1,28 @@ +--- a/net/netlink/af_netlink.c ++++ b/net/netlink/af_netlink.c +@@ -854,25 +854,7 @@ void netlink_detachskb(struct sock *sk, + + static struct sk_buff *netlink_trim(struct sk_buff *skb, gfp_t allocation) + { +- int delta; +- + skb_orphan(skb); +- +- delta = skb->end - skb->tail; +- if (delta * 2 < skb->truesize) +- return skb; +- +- if (skb_shared(skb)) { +- struct sk_buff *nskb = skb_clone(skb, allocation); +- if (!nskb) +- return skb; +- kfree_skb(skb); +- skb = nskb; +- } +- +- if (!pskb_expand_head(skb, 0, -delta, allocation)) +- skb->truesize -= delta; +- + return skb; + } + |