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tunnel: eliminate recursion field

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It seems recursion field from "struct ip_tunnel" is not anymore needed.
recursion prevention is done at the upper level (in dev_queue_xmit()),
since we use HARD_TX_LOCK protection for tunnels.

This avoids a cache line ping pong on "struct ip_tunnel" : This structure
should be now mostly read on xmit and receive paths.

Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Eric Dumazet 2009-09-23 10:28:33 +00:00 • committed by David S. Miller
parent edf42a27e8
commit a43912ab19
5 changed files with 1 additions and 36 deletions
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1
include/net/ipip.h
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@ -12,7 +12,6 @@ struct ip_tunnel
struct ip_tunnel *next;
struct net_device *dev;
int recursion; /* Depth of hard_start_xmit recursion */
int err_count; /* Number of arrived ICMP errors */
unsigned long err_time; /* Time when the last ICMP error arrived */