netdev - [PATCH net-next] igbvf: fix truesize underestimation

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Message-ID: <1319138538.2854.9.camel@edumazet-laptop>
Date:	Thu, 20 Oct 2011 21:22:18 +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] igbvf: fix truesize underestimation

igbvf 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>
CC: Jeff Kirsher <jeffrey.t.kirsher@...el.com>
---
 drivers/net/ethernet/intel/igbvf/netdev.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/intel/igbvf/netdev.c b/drivers/net/ethernet/intel/igbvf/netdev.c
index 1bd9abd..db29817 100644
--- a/drivers/net/ethernet/intel/igbvf/netdev.c
+++ b/drivers/net/ethernet/intel/igbvf/netdev.c
@@ -312,7 +312,7 @@ static bool igbvf_clean_rx_irq(struct igbvf_adapter *adapter,
 
 			skb->len += length;
 			skb->data_len += length;
-			skb->truesize += length;
+			skb->truesize += PAGE_SIZE / 2;
 		}
 send_up:
 		i++;


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