diff options
| author | Eliezer Tamir <eliezer.tamir@linux.intel.com> | 2013-06-10 11:39:50 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2013-06-10 21:22:35 -0700 |
| commit | 060212928670593fb89243640bf05cf89560b023 (patch) | |
| tree | 32ae5c7be094983fb06430dbe09d36e2b317ca9c /include/linux/skbuff.h | |
| parent | af12fa6e46aa651e7b86a4c4117b562518fef184 (diff) | |
net: add low latency socket poll
Adds an ndo_ll_poll method and the code that supports it.
This method can be used by low latency applications to busy-poll
Ethernet device queues directly from the socket code.
sysctl_net_ll_poll controls how many microseconds to poll.
Default is zero (disabled).
Individual protocol support will be added by subsequent patches.
Signed-off-by: Alexander Duyck <alexander.h.duyck@intel.com>
Signed-off-by: Jesse Brandeburg <jesse.brandeburg@intel.com>
Signed-off-by: Eliezer Tamir <eliezer.tamir@linux.intel.com>
Acked-by: Eric Dumazet <edumazet@google.com>
Tested-by: Willem de Bruijn <willemb@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/linux/skbuff.h')
| -rw-r--r-- | include/linux/skbuff.h | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h index 9995834d2cb6..400d82ae2b03 100644 --- a/include/linux/skbuff.h +++ b/include/linux/skbuff.h @@ -386,6 +386,7 @@ typedef unsigned char *sk_buff_data_t; * @no_fcs: Request NIC to treat last 4 bytes as Ethernet FCS * @dma_cookie: a cookie to one of several possible DMA operations * done by skb DMA functions + * @napi_id: id of the NAPI struct this skb came from * @secmark: security marking * @mark: Generic packet mark * @dropcount: total number of sk_receive_queue overflows @@ -500,8 +501,11 @@ struct sk_buff { /* 7/9 bit hole (depending on ndisc_nodetype presence) */ kmemcheck_bitfield_end(flags2); -#ifdef CONFIG_NET_DMA - dma_cookie_t dma_cookie; +#if defined CONFIG_NET_DMA || defined CONFIG_NET_LL_RX_POLL + union { + unsigned int napi_id; + dma_cookie_t dma_cookie; + }; #endif #ifdef CONFIG_NETWORK_SECMARK __u32 secmark; |