From 121b27fb2b3554653aae0f5cfec0c626f29bf75a Mon Sep 17 00:00:00 2001 From: Felix Fietkau Date: Sat, 18 Dec 2010 17:23:38 +0000 Subject: [PATCH] mac80211: significantly reduce the cpu load caused by excessive skb header cloning SVN-Revision: 24669 --- .../patches/540-mac80211_tx_optimization.patch | 14 ++++++++++++++ 1 file changed, 14 insertions(+) create mode 100644 package/mac80211/patches/540-mac80211_tx_optimization.patch diff --git a/package/mac80211/patches/540-mac80211_tx_optimization.patch b/package/mac80211/patches/540-mac80211_tx_optimization.patch new file mode 100644 index 0000000000..e239abd828 --- /dev/null +++ b/package/mac80211/patches/540-mac80211_tx_optimization.patch @@ -0,0 +1,14 @@ +--- a/net/mac80211/tx.c ++++ b/net/mac80211/tx.c +@@ -1549,8 +1549,10 @@ static int ieee80211_skb_resize(struct i + + if (skb_header_cloned(skb)) + I802_DEBUG_INC(local->tx_expand_skb_head_cloned); +- else ++ else if (head_need || tail_need) + I802_DEBUG_INC(local->tx_expand_skb_head); ++ else ++ return; + + if (pskb_expand_head(skb, head_need, tail_need, GFP_ATOMIC)) { + wiphy_debug(local->hw.wiphy,