| Message ID | 1401791268-14027-1-git-send-email-luis.henriques@canonical.com |
|---|---|
| State | New |
| Headers | show |
diff --git a/net/core/dev.c b/net/core/dev.c index ab07f35d0f38..363e06e58c81 100644 --- a/net/core/dev.c +++ b/net/core/dev.c @@ -3962,6 +3962,7 @@ static void napi_reuse_skb(struct napi_struct *napi, struct sk_buff *skb) skb->vlan_tci = 0; skb->dev = napi->dev; skb->skb_iif = 0; + skb->truesize = SKB_TRUESIZE(skb_end_offset(skb)); napi->skb = skb; }
This is a note to let you know that I have just added a patch titled net-gro: reset skb->truesize in napi_reuse_skb() to the linux-3.11.y-queue branch of the 3.11.y.z extended stable tree which can be found at: http://kernel.ubuntu.com/git?p=ubuntu/linux.git;a=shortlog;h=refs/heads/linux-3.11.y-queue If you, or anyone else, feels it should not be added to this tree, please reply to this email. For more information about the 3.11.y.z tree, see https://wiki.ubuntu.com/Kernel/Dev/ExtendedStable Thanks. -Luis ------ From a5fcb6c6cc1a1b0bc03ba8132b878253d6d5f201 Mon Sep 17 00:00:00 2001 From: Eric Dumazet <edumazet@google.com> Date: Thu, 3 Apr 2014 09:28:10 -0700 Subject: net-gro: reset skb->truesize in napi_reuse_skb() commit e33d0ba8047b049c9262fdb1fcafb93cb52ceceb upstream. Recycling skb always had been very tough... This time it appears GRO layer can accumulate skb->truesize adjustments made by drivers when they attach a fragment to skb. skb_gro_receive() can only subtract from skb->truesize the used part of a fragment. I spotted this problem seeing TcpExtPruneCalled and TcpExtTCPRcvCollapsed that were unexpected with a recent kernel, where TCP receive window should be sized properly to accept traffic coming from a driver not overshooting skb->truesize. Signed-off-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Luis Henriques <luis.henriques@canonical.com> --- net/core/dev.c | 1 + 1 file changed, 1 insertion(+) -- 1.9.1