diff options
| author | Eric Dumazet <edumazet@google.com> | 2015-11-18 06:30:50 -0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-06-14 13:16:26 +0200 |
| commit | 52d8b8ad2b4ba478b55e0dfff56a13ab436a6b65 (patch) | |
| tree | 84d1e0dbb0c2f9d8c9e53b3a028a362f9a3bc441 /include/linux/memblock.h | |
| parent | 3c0fcb52674afb2a88097510203678fe3d441c71 (diff) | |
net: better skb->sender_cpu and skb->napi_id cohabitation
commit 52bd2d62ce6758d811edcbd2256eb9ea7f6a56cb upstream.
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>
Cc: Paul Menzel <pmenzel@molgen.mpg.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'include/linux/memblock.h')
0 files changed, 0 insertions, 0 deletions