diff options
Diffstat (limited to 'lib/librte_ring/rte_ring.h')
| -rw-r--r-- | lib/librte_ring/rte_ring.h | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/lib/librte_ring/rte_ring.h b/lib/librte_ring/rte_ring.h index 32b8c8d2..c1b311a8 100644 --- a/lib/librte_ring/rte_ring.h +++ b/lib/librte_ring/rte_ring.h @@ -450,6 +450,12 @@ __rte_ring_mp_do_enqueue(struct rte_ring *r, void * const *obj_table, n = max; prod_head = r->prod.head; + + /* add rmb barrier to avoid load/load reorder in weak + * memory model. It is noop on x86 + */ + rte_smp_rmb(); + cons_tail = r->cons.tail; /* The subtraction is done between two unsigned 32bits value * (the result is always modulo 32 bits even if we have @@ -642,6 +648,12 @@ __rte_ring_mc_do_dequeue(struct rte_ring *r, void **obj_table, n = max; cons_head = r->cons.head; + + /* add rmb barrier to avoid load/load reorder in weak + * memory model. It is noop on x86 + */ + rte_smp_rmb(); + prod_tail = r->prod.tail; /* The subtraction is done between two unsigned 32bits value * (the result is always modulo 32 bits even if we have |