On 09/10/2026 07:05, Wathsala Vithanage wrote:
/*
* Marks given callback as used by datapath.
*/
static __rte_always_inline void
bpf_eth_cbi_inuse(struct bpf_eth_cbi *cbi)
{
- cbi->use++;
- /* make sure no store/load reordering could happen */
- rte_smp_mb();
+ rte_atomic_store_explicit(&cbi->use,
+ rte_atomic_load_explicit(&cbi->use,
rte_memory_order_relaxed) + 1,
+ rte_memory_order_relaxed);
+
+ /* full barrier: count must be visible before cb is read */
+ rte_atomic_thread_fence(rte_memory_order_seq_cst);
NAK: optimizing this increment makes little sense when more careful
analysis shows that it can be simply removed.
I highly recommend keeping this patchset dedicated to removing
rte_smp_XX barriers and moving other bpf_pkt.c improvements elsewhere.
