[PATCH v3 18/18] NTB: Increase transport MTU to 64k from 16k

From: Allen Hubbe
Date: Tue Jun 09 2015 - 10:46:11 EST


From: Dave Jiang <dave.jiang@xxxxxxxxx>

Benchmarking showed significant performance increase going from MTU size
of 64k from 16k. Changing the default.

Signed-off-by: Dave Jiang <dave.jiang@xxxxxxxxx>
---
drivers/ntb/ntb_transport.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/ntb/ntb_transport.c b/drivers/ntb/ntb_transport.c
index ea237aeca28c..c87bc0cbd607 100644
--- a/drivers/ntb/ntb_transport.c
+++ b/drivers/ntb/ntb_transport.c
@@ -76,7 +76,7 @@ static unsigned long max_mw_size;
module_param(max_mw_size, ulong, 0644);
MODULE_PARM_DESC(max_mw_size, "Limit size of large memory windows");

-static unsigned int transport_mtu = 0x401E;
+static unsigned int transport_mtu = 0x10000;
module_param(transport_mtu, uint, 0644);
MODULE_PARM_DESC(transport_mtu, "Maximum size of NTB transport packets");

--
2.4.0.rc0.43.gcf8a8c6

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