diff options
Diffstat (limited to 'target/linux/generic/patches-3.13/656-skb_reduce_truesize-helper.patch')
| -rw-r--r-- | target/linux/generic/patches-3.13/656-skb_reduce_truesize-helper.patch | 41 |
1 files changed, 0 insertions, 41 deletions
diff --git a/target/linux/generic/patches-3.13/656-skb_reduce_truesize-helper.patch b/target/linux/generic/patches-3.13/656-skb_reduce_truesize-helper.patch deleted file mode 100644 index f1cf4524c6..0000000000 --- a/target/linux/generic/patches-3.13/656-skb_reduce_truesize-helper.patch +++ /dev/null @@ -1,41 +0,0 @@ -From 4593a806e31119c5bd3faa00c7210ad862d515af Mon Sep 17 00:00:00 2001 -From: Dave Taht <dave.taht@bufferbloat.net> -Date: Mon, 31 Dec 2012 10:02:21 -0800 -Subject: [PATCH 3/7] skb_reduce_truesize: helper function for shrinking skbs - whenever needed - -On embedded devices in particular, large queues of small packets from the rx -path with a large truesize can exist. Reducing their size can reduce -memory pressure. skb_reduce_truesize is a helper function for doing this, -when needed. ---- - include/linux/skbuff.h | 18 ++++++++++++++++++ - 1 file changed, 18 insertions(+) - ---- a/include/linux/skbuff.h -+++ b/include/linux/skbuff.h -@@ -1791,6 +1791,24 @@ static inline void pskb_trim_unique(stru - BUG_ON(err); - } - -+/* -+ * Caller wants to reduce memory needs before queueing skb -+ * The (expensive) copy should not be be done in fast path. -+ */ -+static inline struct sk_buff *skb_reduce_truesize(struct sk_buff *skb) -+{ -+ if (skb->truesize > 2 * SKB_TRUESIZE(skb->len)) { -+ struct sk_buff *nskb; -+ nskb = skb_copy_expand(skb, skb_headroom(skb), 0, -+ GFP_ATOMIC | __GFP_NOWARN); -+ if (nskb) { -+ __kfree_skb(skb); -+ skb = nskb; -+ } -+ } -+ return skb; -+} -+ - /** - * skb_orphan - orphan a buffer - * @skb: buffer to orphan |