diff options
author | nbd <nbd@3c298f89-4303-0410-b956-a3cf2f4a3e73> | 2012-05-27 14:43:58 +0000 |
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committer | nbd <nbd@3c298f89-4303-0410-b956-a3cf2f4a3e73> | 2012-05-27 14:43:58 +0000 |
commit | 4cf70ab2e1f2f6b50ccd8d62471507f253c4c003 (patch) | |
tree | 437afa2ce20c1a5e28af78144db40d717f81bc48 /target/linux/generic/patches-3.3/653-disable_netlink_trim.patch | |
parent | 878544bb079df3585b319d65f18633586d57964e (diff) |
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 000000000..c6c7c75a9 --- /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; + } + |