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--- a/include/linux/skbuff.h
+++ b/include/linux/skbuff.h
@@ -1353,11 +1353,18 @@ static inline int skb_network_offset(con
*
* Various parts of the networking layer expect at least 32 bytes of
* headroom, you should not reduce this.
+ *
+ * This has been changed to 64 to acommodate for routing between ethernet
+ * and wireless, but only for new allocations
*/
#ifndef NET_SKB_PAD
#define NET_SKB_PAD 32
#endif
+#ifndef NET_SKB_PAD_ALLOC
+#define NET_SKB_PAD_ALLOC 64
+#endif
+
extern int ___pskb_trim(struct sk_buff *skb, unsigned int len);
static inline void __skb_trim(struct sk_buff *skb, unsigned int len)
@@ -1447,9 +1454,9 @@ static inline void __skb_queue_purge(str
static inline struct sk_buff *__dev_alloc_skb(unsigned int length,
gfp_t gfp_mask)
{
- struct sk_buff *skb = alloc_skb(length + NET_SKB_PAD, gfp_mask);
+ struct sk_buff *skb = alloc_skb(length + NET_SKB_PAD_ALLOC, gfp_mask);
if (likely(skb))
- skb_reserve(skb, NET_SKB_PAD);
+ skb_reserve(skb, NET_SKB_PAD_ALLOC);
return skb;
}
@@ -1532,7 +1539,7 @@ static inline int __skb_cow(struct sk_bu
delta = headroom - skb_headroom(skb);
if (delta || cloned)
- return pskb_expand_head(skb, ALIGN(delta, NET_SKB_PAD), 0,
+ return pskb_expand_head(skb, ALIGN(delta, NET_SKB_PAD_ALLOC), 0,
GFP_ATOMIC);
return 0;
}
--- a/net/core/skbuff.c
+++ b/net/core/skbuff.c
@@ -259,9 +259,9 @@ struct sk_buff *__netdev_alloc_skb(struc
int node = dev->dev.parent ? dev_to_node(dev->dev.parent) : -1;
struct sk_buff *skb;
- skb = __alloc_skb(length + NET_SKB_PAD, gfp_mask, 0, node);
+ skb = __alloc_skb(length + NET_SKB_PAD_ALLOC, gfp_mask, 0, node);
if (likely(skb)) {
- skb_reserve(skb, NET_SKB_PAD);
+ skb_reserve(skb, NET_SKB_PAD_ALLOC);
skb->dev = dev;
}
return skb;
|
