Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit 9136461a authored by Eric Dumazet's avatar Eric Dumazet Committed by David S. Miller
Browse files

net: keep name_hlist close to name 



__dev_get_by_name() is slow because pm_qos_req has been inserted between
name[] and name_hlist, adding cache misses.

pm_qos_req has nothing to do at the beginning of struct net_device

Signed-off-by: default avatarEric Dumazet <edumazet@google.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 67da2552

include/linux/netdevice.h

+4 −3
Original line number Diff line number Diff line
@@ -1046,10 +1046,9 @@ struct net_device { 
	 */

	char			name[IFNAMSIZ];



	struct pm_qos_request	pm_qos_req;



	/* device name hash chain */

	/* device name hash chain, please keep it close to name[] */

	struct hlist_node	name_hlist;



	/* snmp alias */

	char 			*ifalias;
@@ -1322,6 +1321,8 @@ struct net_device { 


	/* group the device belongs to */

	int group;



	struct pm_qos_request	pm_qos_req;

};

#define to_net_dev(d) container_of(d, struct net_device, dev)