net: ena: change rx copybreak default to reduce kernel memory pressure

BugLink: http://bugs.launchpad.net/bugs/1798182
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 <akiyano@amazon.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
(cherry picked from commit 87731f0c681c9682c5521e5197d89e561b7da395 linux-next)
Signed-off-by: Kamal Mostafa <kamal@canonical.com>
Acked-by: Khalid Elmously <khalid.elmously@canonical.com>
Acked-by: Seth Forshee <seth.forshee@canonical.com>
Signed-off-by: Khalid Elmously <khalid.elmously@canonical.com>
Signed-off-by: Stefan Bader <stefan.bader@canonical.com>

diff --git a/drivers/net/ethernet/amazon/ena/ena_netdev.h b/drivers/net/ethernet/amazon/ena/ena_netdev.h
index 0cf35ae778846f36e062d78096d986bc251c6fa6..d241dfc542caf8933c7426a48952d8cf65c12508 100644 (file)
--- a/drivers/net/ethernet/amazon/ena/ena_netdev.h
+++ b/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