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| author | Alexander Duyck <alexander.h.duyck@intel.com> | 2009-06-04 15:59:49 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2009-06-07 05:20:20 -0700 |
| commit | 21fa4e66bd0bedfa4ed6aa6f7008b2aff6d45c8d (patch) | |
| tree | a0a828616b4645b5843b62de87321857096ae7a5 /drivers | |
| parent | 74766013a131f1e1c2fe8fd138e12841eb708060 (diff) | |
| download | linux-21fa4e66bd0bedfa4ed6aa6f7008b2aff6d45c8d.tar.gz linux-21fa4e66bd0bedfa4ed6aa6f7008b2aff6d45c8d.tar.bz2 linux-21fa4e66bd0bedfa4ed6aa6f7008b2aff6d45c8d.zip | |
ixgbe: use rx_buffer_info->dma instead of nr_frags to determine skb unmap
This patch changes the driver so that it uses rx_buffer_info->dma to
determine if it needs to unmap the page instead of sh_info->nr_frags. This
helps to prevent a cache line miss when receiving small packets as the
rx_buffer_info data should already be in the cache.
Signed-off-by: Alexander Duyck <alexander.h.duyck@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/net/ixgbe/ixgbe_main.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/net/ixgbe/ixgbe_main.c b/drivers/net/ixgbe/ixgbe_main.c index 9684632f15b8..e1efa1d7df4e 100644 --- a/drivers/net/ixgbe/ixgbe_main.c +++ b/drivers/net/ixgbe/ixgbe_main.c @@ -708,7 +708,7 @@ static bool ixgbe_clean_rx_irq(struct ixgbe_q_vector *q_vector, prefetch(skb->data - NET_IP_ALIGN); rx_buffer_info->skb = NULL; - if (len && !skb_shinfo(skb)->nr_frags) { + if (rx_buffer_info->dma) { pci_unmap_single(pdev, rx_buffer_info->dma, rx_ring->rx_buf_len, PCI_DMA_FROMDEVICE); |