SYNOPSIS

struct sk_buff * __napi_alloc_skb(struct napi_struct * napi, unsigned int len, gfp_t gfp_mask);

ARGUMENTS

napi

napi instance this buffer was allocated for

len

length to allocate

gfp_mask

get_free_pages mask, passed to alloc_skb and alloc_pages

DESCRIPTION

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.

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