sk_page_frag — return an appropriate page_frag
struct page_frag * sk_page_frag ( | struct sock * sk); |
Use the per task page_frag instead of the per socket one for
optimization when we know that we're in the normal context and owns
everything that's associated with current.
Testing __GFP_WAIT isn't enough here as direct reclaim may nest
inside other socket operations and end up recursing into sk_page_frag
while it's already in use.