[PATCH 3/3] RFC: net: apply __GFP_NOINIT to AF_UNIX sk_buff allocations

[Kees Cook]

On Thu, Apr 18, 2019 at 8:42 AM Alexander Potapenko <glider at google.com> wrote:
>
> Add sock_alloc_send_pskb_noinit(), which is similar to
> sock_alloc_send_pskb(), but allocates with __GFP_NOINIT.
> This helps reduce the slowdown on hackbench from 9% to 0.1%.

I would include a detailed justification about why this is safe to do.
I imagine (but haven't looked) that the skb is immediately written to
after allocation, so this is basically avoiding a "double init". Is
that correct?

-- 
Kees Cook