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| author | Eric Dumazet <edumazet@google.com> | 2015-11-18 17:30:50 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2015-11-19 00:17:37 +0300 |
| commit | 52bd2d62ce6758d811edcbd2256eb9ea7f6a56cb (patch) | |
| tree | a05cc3913f4389700efef15cccf882befbcd6d32 /drivers/net/ethernet/mellanox/mlx4/mlx4_en.h | |
| parent | d37b4c0a3647db23f41c5ee85701eec3544446d1 (diff) | |
| download | linux-52bd2d62ce6758d811edcbd2256eb9ea7f6a56cb.tar.xz | |
net: better skb->sender_cpu and skb->napi_id cohabitation
skb->sender_cpu and skb->napi_id share a common storage,
and we had various bugs about this.
We had to call skb_sender_cpu_clear() in some places to
not leave a prior skb->napi_id and fool netdev_pick_tx()
As suggested by Alexei, we could split the space so that
these errors can not happen.
0 value being reserved as the common (not initialized) value,
let's reserve [1 .. NR_CPUS] range for valid sender_cpu,
and [NR_CPUS+1 .. ~0U] for valid napi_id.
This will allow proper busy polling support over tunnels.
Signed-off-by: Eric Dumazet <edumazet@google.com>
Suggested-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/ethernet/mellanox/mlx4/mlx4_en.h')
0 files changed, 0 insertions, 0 deletions