diff mbox

[2/2,net-next] net_device: Reorder members to fill holes

Message ID 1df55f36edb4bd47a051e2664d243a3e91d29fb4.1428672434.git.tgraf@suug.ch
State Awaiting Upstream
Headers show

Commit Message

Thomas Graf April 10, 2015, 1:52 p.m. UTC
Some trivial reorders while preserving the RX/TX cache lines
split to fill a couple of holes.

Signed-off-by: Thomas Graf <tgraf@suug.ch>
---
 include/linux/netdevice.h | 45 +++++++++++++++++++++------------------------
 1 file changed, 21 insertions(+), 24 deletions(-)

Comments

Eric Dumazet April 10, 2015, 7:39 p.m. UTC | #1
On Fri, 2015-04-10 at 15:52 +0200, Thomas Graf wrote:
> Some trivial reorders while preserving the RX/TX cache lines
> split to fill a couple of holes.
> 
> Signed-off-by: Thomas Graf <tgraf@suug.ch>
> ---
>  include/linux/netdevice.h | 45 +++++++++++++++++++++------------------------
>  1 file changed, 21 insertions(+), 24 deletions(-)

Acked-by: Eric Dumazet <edumazet@google.com>

Thanks Thomas !
diff mbox

Patch

diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h
index d66c0f9..908f0e7 100644
--- a/include/linux/netdevice.h
+++ b/include/linux/netdevice.h
@@ -1305,6 +1305,8 @@  enum netdev_priv_flags {
  *	@base_addr:	Device I/O address
  *	@irq:		Device IRQ number
  *
+ *	@carrier_changes:	Stats to monitor carrier on<->off transitions
+ *
  *	@state:		Generic network queuing layer state, see netdev_state_t
  *	@dev_list:	The global list of network devices
  *	@napi_list:	List entry, that is used for polling napi devices
@@ -1338,8 +1340,6 @@  enum netdev_priv_flags {
  *	@tx_dropped:	Dropped packets by core network,
  *			do not use this in drivers
  *
- *	@carrier_changes:	Stats to monitor carrier on<->off transitions
- *
  *	@wireless_handlers:	List of functions to handle Wireless Extensions,
  *				instead of ioctl,
  *				see <net/iw_handler.h> for details.
@@ -1382,14 +1382,14 @@  enum netdev_priv_flags {
  * 	@dev_port:		Used to differentiate devices that share
  * 				the same function
  *	@addr_list_lock:	XXX: need comments on this one
- *	@uc:			unicast mac addresses
- *	@mc:			multicast mac addresses
- *	@dev_addrs:		list of device hw addresses
- *	@queues_kset:		Group of all Kobjects in the Tx and RX queues
  *	@uc_promisc:		Counter, that indicates, that promiscuous mode
  *				has been enabled due to the need to listen to
  *				additional unicast addresses in a device that
  *				does not implement ndo_set_rx_mode()
+ *	@uc:			unicast mac addresses
+ *	@mc:			multicast mac addresses
+ *	@dev_addrs:		list of device hw addresses
+ *	@queues_kset:		Group of all Kobjects in the Tx and RX queues
  *	@promiscuity:		Number of times, the NIC is told to work in
  *				Promiscuous mode, if it becomes 0 the NIC will
  *				exit from working in Promiscuous mode
@@ -1419,6 +1419,12 @@  enum netdev_priv_flags {
  *	@ingress_queue:		XXX: need comments on this one
  *	@broadcast:		hw bcast address
  *
+ *	@rx_cpu_rmap:	CPU reverse-mapping for RX completion interrupts,
+ *			indexed by RX queue number. Assigned by driver.
+ *			This must only be set if the ndo_rx_flow_steer
+ *			operation is defined
+ *	@index_hlist:		Device index hash chain
+ *
  *	@_tx:			Array of TX queues
  *	@num_tx_queues:		Number of TX queues allocated at alloc_netdev_mq() time
  *	@real_num_tx_queues: 	Number of TX queues currently active in device
@@ -1428,11 +1434,6 @@  enum netdev_priv_flags {
  *
  *	@xps_maps:	XXX: need comments on this one
  *
- *	@rx_cpu_rmap:	CPU reverse-mapping for RX completion interrupts,
- *			indexed by RX queue number. Assigned by driver.
- *			This must only be set if the ndo_rx_flow_steer
- *			operation is defined
- *
  *	@trans_start:		Time (in jiffies) of last Tx
  *	@watchdog_timeo:	Represents the timeout that is used by
  *				the watchdog ( see dev_watchdog() )
@@ -1440,7 +1441,6 @@  enum netdev_priv_flags {
  *
  *	@pcpu_refcnt:		Number of references to this device
  *	@todo_list:		Delayed register/unregister
- *	@index_hlist:		Device index hash chain
  *	@link_watch_list:	XXX: need comments on this one
  *
  *	@reg_state:		Register/unregister state machine
@@ -1507,6 +1507,8 @@  struct net_device {
 	unsigned long		base_addr;
 	int			irq;
 
+	atomic_t		carrier_changes;
+
 	/*
 	 *	Some hardware also needs these fields (state,dev_list,
 	 *	napi_list,unreg_list,close_list) but they are not
@@ -1547,8 +1549,6 @@  struct net_device {
 	atomic_long_t		rx_dropped;
 	atomic_long_t		tx_dropped;
 
-	atomic_t		carrier_changes;
-
 #ifdef CONFIG_WIRELESS_EXT
 	const struct iw_handler_def *	wireless_handlers;
 	struct iw_public_data *	wireless_data;
@@ -1588,6 +1588,8 @@  struct net_device {
 	unsigned short          dev_id;
 	unsigned short          dev_port;
 	spinlock_t		addr_list_lock;
+	unsigned char		name_assign_type;
+	bool			uc_promisc;
 	struct netdev_hw_addr_list	uc;
 	struct netdev_hw_addr_list	mc;
 	struct netdev_hw_addr_list	dev_addrs;
@@ -1595,10 +1597,6 @@  struct net_device {
 #ifdef CONFIG_SYSFS
 	struct kset		*queues_kset;
 #endif
-
-	unsigned char		name_assign_type;
-
-	bool			uc_promisc;
 	unsigned int		promiscuity;
 	unsigned int		allmulti;
 
@@ -1645,7 +1643,10 @@  struct net_device {
 
 	struct netdev_queue __rcu *ingress_queue;
 	unsigned char		broadcast[MAX_ADDR_LEN];
-
+#ifdef CONFIG_RFS_ACCEL
+	struct cpu_rmap		*rx_cpu_rmap;
+#endif
+	struct hlist_node	index_hlist;
 
 /*
  * Cache lines mostly used on transmit path
@@ -1656,13 +1657,11 @@  struct net_device {
 	struct Qdisc		*qdisc;
 	unsigned long		tx_queue_len;
 	spinlock_t		tx_global_lock;
+	int			watchdog_timeo;
 
 #ifdef CONFIG_XPS
 	struct xps_dev_maps __rcu *xps_maps;
 #endif
-#ifdef CONFIG_RFS_ACCEL
-	struct cpu_rmap		*rx_cpu_rmap;
-#endif
 
 	/* These may be needed for future network-power-down code. */
 
@@ -1672,13 +1671,11 @@  struct net_device {
 	 */
 	unsigned long		trans_start;
 
-	int			watchdog_timeo;
 	struct timer_list	watchdog_timer;
 
 	int __percpu		*pcpu_refcnt;
 	struct list_head	todo_list;
 
-	struct hlist_node	index_hlist;
 	struct list_head	link_watch_list;
 
 	enum { NETREG_UNINITIALIZED=0,