| Message ID | 20150409014943.4434.58640.stgit@ahduyck-vm-fedora22 |
|---|---|
| State | Accepted, archived |
| Delegated to: | David Miller |
| Headers | show |
On Wed, 2015-04-08 at 18:49 -0700, Alexander Duyck wrote: > Update i40e and i40evf to use dma_rmb. This should improve > performance by > decreasing the barrier overhead on strong ordered architectures. > > Cc: Jeff Kirsher <jeffrey.t.kirsher@intel.com> > Signed-off-by: Alexander Duyck <alexander.h.duyck@redhat.com> Acked-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com> > --- > drivers/net/ethernet/intel/i40e/i40e_txrx.c | 4 ++-- > drivers/net/ethernet/intel/i40evf/i40e_txrx.c | 4 ++-- > 2 files changed, 4 insertions(+), 4 deletions(-)
diff --git a/drivers/net/ethernet/intel/i40e/i40e_txrx.c b/drivers/net/ethernet/intel/i40e/i40e_txrx.c index d8989f9d1798..4bd3a80aba82 100644 --- a/drivers/net/ethernet/intel/i40e/i40e_txrx.c +++ b/drivers/net/ethernet/intel/i40e/i40e_txrx.c @@ -1554,7 +1554,7 @@ static int i40e_clean_rx_irq_ps(struct i40e_ring *rx_ring, int budget) * any other fields out of the rx_desc until we know the * DD bit is set. */ - rmb(); + dma_rmb(); if (i40e_rx_is_programming_status(qword)) { i40e_clean_programming_status(rx_ring, rx_desc); I40E_RX_INCREMENT(rx_ring, i); @@ -1745,7 +1745,7 @@ static int i40e_clean_rx_irq_1buf(struct i40e_ring *rx_ring, int budget) * any other fields out of the rx_desc until we know the * DD bit is set. */ - rmb(); + dma_rmb(); if (i40e_rx_is_programming_status(qword)) { i40e_clean_programming_status(rx_ring, rx_desc); diff --git a/drivers/net/ethernet/intel/i40evf/i40e_txrx.c b/drivers/net/ethernet/intel/i40evf/i40e_txrx.c index e2ddb30e96f5..b077e02a0cc7 100644 --- a/drivers/net/ethernet/intel/i40evf/i40e_txrx.c +++ b/drivers/net/ethernet/intel/i40evf/i40e_txrx.c @@ -1034,7 +1034,7 @@ static int i40e_clean_rx_irq_ps(struct i40e_ring *rx_ring, int budget) * any other fields out of the rx_desc until we know the * DD bit is set. */ - rmb(); + dma_rmb(); rx_bi = &rx_ring->rx_bi[i]; skb = rx_bi->skb; if (likely(!skb)) { @@ -1213,7 +1213,7 @@ static int i40e_clean_rx_irq_1buf(struct i40e_ring *rx_ring, int budget) * any other fields out of the rx_desc until we know the * DD bit is set. */ - rmb(); + dma_rmb(); rx_bi = &rx_ring->rx_bi[i]; skb = rx_bi->skb;
Update i40e and i40evf to use dma_rmb. This should improve performance by decreasing the barrier overhead on strong ordered architectures. Cc: Jeff Kirsher <jeffrey.t.kirsher@intel.com> Signed-off-by: Alexander Duyck <alexander.h.duyck@redhat.com> --- drivers/net/ethernet/intel/i40e/i40e_txrx.c | 4 ++-- drivers/net/ethernet/intel/i40evf/i40e_txrx.c | 4 ++-- 2 files changed, 4 insertions(+), 4 deletions(-) -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html