From: Arthur Kiyanovski Date: Thu, 11 Oct 2018 11:26:24 +0300 Subject: [PATCH 10/19] net: ena: change rx copybreak default to reduce kernel memory pressure Origin: https://git.kernel.org/linus/87731f0c681c9682c5521e5197d89e561b7da395 Improves socket memory utilization when receiving packets larger than 128 bytes (the previous rx copybreak) and smaller than 256 bytes. Signed-off-by: Arthur Kiyanovski Signed-off-by: David S. Miller --- drivers/net/ethernet/amazon/ena/ena_netdev.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) Index: linux/drivers/net/ethernet/amazon/ena/ena_netdev.h =================================================================== --- linux.orig/drivers/net/ethernet/amazon/ena/ena_netdev.h +++ linux/drivers/net/ethernet/amazon/ena/ena_netdev.h @@ -81,7 +81,7 @@ #define ENA_DEFAULT_RING_SIZE (1024) #define ENA_TX_WAKEUP_THRESH (MAX_SKB_FRAGS + 2) -#define ENA_DEFAULT_RX_COPYBREAK (128 - NET_IP_ALIGN) +#define ENA_DEFAULT_RX_COPYBREAK (256 - NET_IP_ALIGN) /* limit the buffer size to 600 bytes to handle MTU changes from very * small to very large, in which case the number of buffers per packet