Re: [PATCH 07/17] net: convert sock.sk_refcnt from atomic_t to refcount_t
From: Eric Dumazet <hidden>
Date: 2017-03-20 14:59:20
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bridge, lkml
On Mon, 2017-03-20 at 07:51 -0700, Eric Dumazet wrote:
atomic_cmpxchg() on PowerPC is horribly more expensive because of the added two SYNC instructions.
Although I just saw that refcount was using atomic_cmpxchg_relaxed() Time to find some documentation (probably missing) or get some specs for this thing.