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| author |   Eric Dumazet <eric.dumazet@gmail.com> | 2010-08-31 07:40:16 +0000 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2010-08-31 13:37:06 -0700 |
| commit | 4dc89133f49b8cfd77ba7e83f5960aed63aaa99e (patch) | |
| tree | 7629fa72b5a13cbf48d43659bb396984caf7362a /net/ipv4/tcp_ipv4.c | |
| parent | pktgen: remove non used variable (diff) | |
| download | linux-rng-4dc89133f49b8cfd77ba7e83f5960aed63aaa99e.tar.xz linux-rng-4dc89133f49b8cfd77ba7e83f5960aed63aaa99e.zip | |
net: add a comment on netdev->last_rx
As some driver authors seem to reintroduce dev->last_rx use,
add a comment to strongly discourage this.
Since commit 6cf3f41e6c0 (bonding, net: Move last_rx update into bonding
recv logic), network drivers dont need to update last_rx themselves,
unless they use this field to implement a timeout.
Not updating last_rx helps not dirtying a cache line, improving
performance in SMP.
Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv4/tcp_ipv4.c')
0 files changed, 0 insertions, 0 deletions