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| author | Alexander Duyck <alexander.h.duyck@intel.com> | 2012-11-13 04:03:15 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2012-11-13 14:18:13 -0500 |
| commit | f7c405618c41f6d00fdd24311dea9ed8305bf66a (patch) | |
| tree | 8c85f1b16b55373254457af6e37693d786b91635 /drivers/net/ethernet/intel/ixgbe | |
| parent | 9fafd65ad407d4e0c96919a325f568dd95d032af (diff) | |
| download | linux-3.10-f7c405618c41f6d00fdd24311dea9ed8305bf66a.tar.gz linux-3.10-f7c405618c41f6d00fdd24311dea9ed8305bf66a.tar.bz2 linux-3.10-f7c405618c41f6d00fdd24311dea9ed8305bf66a.zip | |
ixgbe: Do not use DCA to prefetch the entire packet into the cache
The way the code was previously written it was causing DCA to prefetch the
entire packet into the cache when it was enabled. That is excessive as we
only really need the headers.
We are now prefetching the headers via software so doing this from DCA would
be redundant anyway. So clear the bit that was causing us to prefetch the
packet data and instead only use DCA for the descriptor rings.
Signed-off-by: Alexander Duyck <alexander.h.duyck@intel.com>
Tested-by: Phil Schmitt <phillip.j.schmitt@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/net/ethernet/intel/ixgbe')
| -rw-r--r-- | drivers/net/ethernet/intel/ixgbe/ixgbe_main.c | 1 |
1 files changed, 0 insertions, 1 deletions
diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c b/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c index 690535a0322..38fc186c53c 100644 --- a/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c +++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c @@ -1015,7 +1015,6 @@ static void ixgbe_update_rx_dca(struct ixgbe_adapter *adapter, * which will cause the DCA tag to be cleared. */ rxctrl |= IXGBE_DCA_RXCTRL_DESC_RRO_EN | - IXGBE_DCA_RXCTRL_DATA_DCA_EN | IXGBE_DCA_RXCTRL_DESC_DCA_EN; IXGBE_WRITE_REG(hw, IXGBE_DCA_RXCTRL(reg_idx), rxctrl); |