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authorEric Dumazet <edumazet@google.com>2013-03-30 06:31:03 +0000
committerDavid S. Miller <davem@davemloft.net>2013-03-30 17:31:24 -0400
commit4c3d5e7b41dda1b1372bfc2545ef092a1bc5ad33 (patch)
tree462060a03b25ae2ab4768c692804de1bca366389 /drivers
parent8f0923c17d34ac838b7f57709f87fe33f76ee219 (diff)
net: reorder some fields of net_device
As time passed, some fields were added in net_device, and not at sensible offsets. Lets reorder some fields to reduce number of cache lines in RX path. Fields not used in data path should be moved out of this critical cache line. In particular, move broadcast[] to the end of the rx section, as it is less used, and ethernet uses only the beginning of the 32bytes field. Before patch : offsetof(struct net_device,dev_addr)=0x258 offsetof(struct net_device,rx_handler)=0x2b8 offsetof(struct net_device,ingress_queue)=0x2c8 offsetof(struct net_device,broadcast)=0x278 After : offsetof(struct net_device,dev_addr)=0x280 offsetof(struct net_device,rx_handler)=0x298 offsetof(struct net_device,ingress_queue)=0x2a8 offsetof(struct net_device,broadcast)=0x2b0 Signed-off-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers')
0 files changed, 0 insertions, 0 deletions