From: Jason Xing Add a union member for completion queue only in copy mode for now. The purpose is to replace the cq_cached_prod_lock with atomic operation to improve performance. Note that completion queue in zerocopy mode doesn't need to be converted because the whole process is lockless. Signed-off-by: Jason Xing --- net/xdp/xsk_queue.h | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/net/xdp/xsk_queue.h b/net/xdp/xsk_queue.h index 1eb8d9f8b104..44cc01555c0b 100644 --- a/net/xdp/xsk_queue.h +++ b/net/xdp/xsk_queue.h @@ -40,7 +40,11 @@ struct xdp_umem_ring { struct xsk_queue { u32 ring_mask; u32 nentries; - u32 cached_prod; + union { + u32 cached_prod; + /* Used for cq in copy mode only */ + atomic_t cached_prod_atomic; + }; u32 cached_cons; struct xdp_ring *ring; u64 invalid_descs; -- 2.41.3