netdev - [PATCH net-next] bnx2: Increase max rx ring size from 1K to 2K

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Message-ID: <1287448254-14173-1-git-send-email-mchan@broadcom.com>
Date:	Mon, 18 Oct 2010 17:30:54 -0700
From:	"Michael Chan" <mchan@...adcom.com>
To:	davem@...emloft.net
cc:	andy@...yhouse.net, jfeeney@...hat.com, netdev@...r.kernel.org
Subject: [PATCH net-next] bnx2: Increase max rx ring size from 1K to 2K

A number of customers are reporting packet loss under certain workloads
(e.g. heavy bursts of small packets) with flow control disabled.  A larger
rx ring helps to prevent these losses.

No change in default rx ring size and memory consumption.

Signed-off-by: Andy Gospodarek <andy@...yhouse.net>
Acked-by: John Feeney <jfeeney@...hat.com>
Signed-off-by: Michael Chan <mchan@...adcom.com>
---
 drivers/net/bnx2.h |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/net/bnx2.h b/drivers/net/bnx2.h
index efdfbc2..62ac83e 100644
--- a/drivers/net/bnx2.h
+++ b/drivers/net/bnx2.h
@@ -6502,8 +6502,8 @@ struct l2_fhdr {
 #define TX_DESC_CNT  (BCM_PAGE_SIZE / sizeof(struct tx_bd))
 #define MAX_TX_DESC_CNT (TX_DESC_CNT - 1)
 
-#define MAX_RX_RINGS	4
-#define MAX_RX_PG_RINGS	16
+#define MAX_RX_RINGS	8
+#define MAX_RX_PG_RINGS	32
 #define RX_DESC_CNT  (BCM_PAGE_SIZE / sizeof(struct rx_bd))
 #define MAX_RX_DESC_CNT (RX_DESC_CNT - 1)
 #define MAX_TOTAL_RX_DESC_CNT (MAX_RX_DESC_CNT * MAX_RX_RINGS)
-- 
1.6.4.GIT


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