netdev - [PATCH net-next 3/3] bnx2x: save RAM in kdump kernel by disabling TPA

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Message-Id: <1393340666-3539-4-git-send-email-mschmidt@redhat.com>
Date:	Tue, 25 Feb 2014 16:04:26 +0100
From:	Michal Schmidt <mschmidt@...hat.com>
To:	davem@...emloft.net
Cc:	netdev@...r.kernel.org, ariele@...adcom.com, dmitry@...adcom.com,
	yuvalmin@...adcom.com
Subject: [PATCH net-next 3/3] bnx2x: save RAM in kdump kernel by disabling TPA

When running in a kdump kernel, disable TPA. This saves memory, which
tends to be scarce in kdump.

TPA, being a receive acceleration, is unlikely to be useful for kdump,
whose purpose is to send the memory image out.

This saves additional 5 MB in the kdump environment.

Signed-off-by: Michal Schmidt <mschmidt@...hat.com>
---
 drivers/net/ethernet/broadcom/bnx2x/bnx2x_main.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/net/ethernet/broadcom/bnx2x/bnx2x_main.c b/drivers/net/ethernet/broadcom/bnx2x/bnx2x_main.c
index 8443915..13de536 100644
--- a/drivers/net/ethernet/broadcom/bnx2x/bnx2x_main.c
+++ b/drivers/net/ethernet/broadcom/bnx2x/bnx2x_main.c
@@ -11783,6 +11783,8 @@ static int bnx2x_init_bp(struct bnx2x *bp)
 
 	bp->disable_tpa = disable_tpa;
 	bp->disable_tpa |= IS_MF_STORAGE_SD(bp) || IS_MF_FCOE_AFEX(bp);
+	/* Reduce memory usage in kdump environment by disabling TPA */
+	bp->disable_tpa |= reset_devices;
 
 	/* Set TPA flags */
 	if (bp->disable_tpa) {
-- 
1.8.5.3

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