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Commit d5bd0146 authored by Neil Turton's avatar Neil Turton Committed by David S. Miller
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[NET]: Improve cache line coherency of ingress qdisc 



Move the ingress qdisc members of struct net_device from the transmit
cache line to the receive cache line to avoid cache line ping-pong.
These members are only used on the receive path.

Signed-off-by: default avatarNeil Turton <nturton@solarflare.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent d8b2a4d2

include/linux/netdevice.h

+4 −4
Original line number Original line Diff line number Diff line
@@ -604,6 +604,10 @@ struct net_device 




	unsigned char		broadcast[MAX_ADDR_LEN];	/* hw bcast add	*/

	unsigned char		broadcast[MAX_ADDR_LEN];	/* hw bcast add	*/





	/* ingress path synchronizer */

	spinlock_t		ingress_lock;

	struct Qdisc		*qdisc_ingress;



/*

/*

 * Cache line mostly used on queue transmit path (qdisc)

 * Cache line mostly used on queue transmit path (qdisc)

 */

 */
@@ -617,10 +621,6 @@ struct net_device 
	/* Partially transmitted GSO packet. */

	/* Partially transmitted GSO packet. */

	struct sk_buff		*gso_skb;

	struct sk_buff		*gso_skb;





	/* ingress path synchronizer */

	spinlock_t		ingress_lock;

	struct Qdisc		*qdisc_ingress;



/*

/*

 * One part is mostly used on xmit path (device)

 * One part is mostly used on xmit path (device)

 */

 */