linux-kernel - [PATCH 4/4] net: tile: don't send interrupts to nohz cores by default

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Message-ID: <1427224895-30830-5-git-send-email-cmetcalf@ezchip.com>
Date:	Tue, 24 Mar 2015 15:21:35 -0400
From:	<cmetcalf@...hip.com>
To:	<linux-kernel@...r.kernel.org>, <netdev@...r.kernel.org>,
	"David S. Miller" <davem@...emloft.net>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Steven Rostedt <rostedt@...dmis.org>,
	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>,
	Ingo Molnar <mingo@...nel.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Peter Zijlstra <peterz@...radead.org>,
	Borislav Petkov <bp@...en8.de>,
	Li Zhong <zhong@...ux.vnet.ibm.com>,
	Mike Galbraith <efault@....de>,
	Kevin Hilman <khilman@...aro.org>
CC:	Chris Metcalf <cmetcalf@...hip.com>
Subject: [PATCH 4/4] net: tile: don't send interrupts to nohz cores by default

From: Chris Metcalf <cmetcalf@...hip.com>

Signed-off-by: Chris Metcalf <cmetcalf@...hip.com>
---
 drivers/net/ethernet/tile/tilegx.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/tile/tilegx.c b/drivers/net/ethernet/tile/tilegx.c
index bea8cd2bb56c..cf9850c6a809 100644
--- a/drivers/net/ethernet/tile/tilegx.c
+++ b/drivers/net/ethernet/tile/tilegx.c
@@ -40,6 +40,7 @@
 #include <linux/tcp.h>
 #include <linux/net_tstamp.h>
 #include <linux/ptp_clock_kernel.h>
+#include <linux/tick.h>
 
 #include <asm/checksum.h>
 #include <asm/homecache.h>
@@ -2271,8 +2272,10 @@ static int __init tile_net_init_module(void)
 	for (i = 0; gxio_mpipe_link_enumerate_mac(i, name, mac) >= 0; i++)
 		tile_net_dev_init(name, mac);
 
-	if (!network_cpus_init())
+	if (!network_cpus_init()) {
 		network_cpus_map = *cpu_online_mask;
+		tick_nohz_full_clear_cpus(&network_cpus_map);
+	}
 
 	return 0;
 }
-- 
2.1.2

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