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mac80211: significantly reduce the cpu load caused by excessive skb header cloning

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SVN-Revision: 24669
This commit is contained in:
Felix Fietkau 2010-12-18 17:23:38 +00:00
parent 4e19240b9b
commit 121b27fb2b
1 changed files with 14 additions and 0 deletions
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14
package/mac80211/patches/540-mac80211_tx_optimization.patch Normal file
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@ -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,