Re: [PATCH] net/udp: do not touch skb->peeked unless really needed

On Wed, 2016-12-07 at 18:37 +0100, Hannes Frederic Sowa wrote:

I had the same idea while discussing that with Paolo, merely using an
*atomic_t = kmalloc(sizeof(atomic_t)) out of band of the socket.

My fear was that those could be aggregated by the slab cache into one
cache line, causing even more heating on cachelines.

For hot stuff, better use kmalloc(max_t(size_t, 
                                        L1_CACHE_BYTES,
                                        sizeof(...)) 
to avoid false sharing, unless this is per cpu data of course.