From ff1b974cf30b282f90993ab658e59b73c152c0b8 Mon Sep 17 00:00:00 2001 From: Benjamin LaHaise Date: Tue, 4 Aug 2009 10:21:21 +0000 Subject: [PATCH] vxge: improve tx performance by using mmiowb() instead of wmb() wmb() is extremely heavy on x86. The semantics required in the driver are provided by mmiowb(), so use that and improve tx performance on P4 Xeons by 5-10%. Signed-off-by: Benjamin LaHaise Signed-off-by: Sreenivasa Honnur Signed-off-by: Ramkrishna Vepa Signed-off-by: David S. Miller --- drivers/net/vxge/vxge-traffic.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/net/vxge/vxge-traffic.c b/drivers/net/vxge/vxge-traffic.c index c249cd2..0efb769 100644 --- a/drivers/net/vxge/vxge-traffic.c +++ b/drivers/net/vxge/vxge-traffic.c @@ -1070,11 +1070,11 @@ static void __vxge_hw_non_offload_db_post(struct __vxge_hw_fifo *fifo, VXGE_HW_NODBW_GET_NO_SNOOP(no_snoop), &fifo->nofl_db->control_0); - wmb(); + mmiowb(); writeq(txdl_ptr, &fifo->nofl_db->txdl_ptr); - wmb(); + mmiowb(); } /** -- 2.7.4