netdev - [PATCH net-next] igb: fix skb truesize underestimation

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Message-ID: <1318528601.2393.57.camel@edumazet-HP-Compaq-6005-Pro-SFF-PC>
Date:	Thu, 13 Oct 2011 19:56:41 +0200
From:	Eric Dumazet <eric.dumazet@...il.com>
To:	David Miller <davem@...emloft.net>
Cc:	netdev <netdev@...r.kernel.org>,
	Jeff Kirsher <jeffrey.t.kirsher@...el.com>
Subject: [PATCH net-next] igb: fix skb truesize underestimation

e1000 allocates half a page per skb fragment. We must account
PAGE_SIZE/2 increments on skb->truesize, not the actual frag length.

Signed-off-by: Eric Dumazet <eric.dumazet@...il.com>
---
 drivers/net/ethernet/intel/igb/igb_main.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/intel/igb/igb_main.c b/drivers/net/ethernet/intel/igb/igb_main.c
index 10670f9..1adcdf8 100644
--- a/drivers/net/ethernet/intel/igb/igb_main.c
+++ b/drivers/net/ethernet/intel/igb/igb_main.c
@@ -5946,7 +5946,7 @@ static bool igb_clean_rx_irq(struct igb_q_vector *q_vector, int budget)
 
 			skb->len += length;
 			skb->data_len += length;
-			skb->truesize += length;
+			skb->truesize += PAGE_SIZE / 2;
 
 			if ((page_count(buffer_info->page) != 1) ||
 			    (page_to_nid(buffer_info->page) != current_node))


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