5.15-stable review patch. If anyone has any objections, please let me know.
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From: Robert Hancock robert.hancock@calian.com
[ Upstream commit 40da5d680e02ca8d61237192db4b5833d3c9639f ]
Now that NAPI has been implemented, the hardware interrupt mitigation mechanism is not needed to avoid excessive interrupt load in most cases. Reduce the default RX interrupt threshold to 1 to reduce introduced latency. This can be increased with ethtool if desired if some applications still want to reduce interrupts.
Signed-off-by: Robert Hancock robert.hancock@calian.com Signed-off-by: David S. Miller davem@davemloft.net Stable-dep-of: 5a6caa2cfabb ("net: xilinx: axienet: Fix packet counting") Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/net/ethernet/xilinx/xilinx_axienet.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/net/ethernet/xilinx/xilinx_axienet.h b/drivers/net/ethernet/xilinx/xilinx_axienet.h index e8a210201f744..d2c17def082b4 100644 --- a/drivers/net/ethernet/xilinx/xilinx_axienet.h +++ b/drivers/net/ethernet/xilinx/xilinx_axienet.h @@ -122,7 +122,7 @@ /* Default TX/RX Threshold and waitbound values for SGDMA mode */ #define XAXIDMA_DFT_TX_THRESHOLD 24 #define XAXIDMA_DFT_TX_WAITBOUND 254 -#define XAXIDMA_DFT_RX_THRESHOLD 24 +#define XAXIDMA_DFT_RX_THRESHOLD 1 #define XAXIDMA_DFT_RX_WAITBOUND 254
#define XAXIDMA_BD_CTRL_TXSOF_MASK 0x08000000 /* First tx packet */