__napi_alloc_skb — allocate skbuff for rx in a specific NAPI instance
struct sk_buff * __napi_alloc_skb ( | struct napi_struct * napi, |
| unsigned int len, | |
gfp_t gfp_mask); |
struct napi_struct * napinapi instance this buffer was allocated for
unsigned int lenlength to allocate
gfp_t gfp_maskget_free_pages mask, passed to alloc_skb and alloc_pages
Allocate a new sk_buff for use in NAPI receive. This buffer will attempt to allocate the head from a special reserved region used only for NAPI Rx allocation. By doing this we can save several CPU cycles by avoiding having to disable and re-enable IRQs.
NULL is returned if there is no free memory.