On Thu, Dec 04, 2014 at 03:26:20PM +0100, Jean-Mickael Guerin wrote: > Add a compiler barrier to make sure all fields covered by > the marker rearm_data are assigned before the read. > > Signed-off-by: Jean-Mickael Guerin <jean-mickael.guerin at 6wind.com> > Acked-by: David Marchand <david.marchand at 6wind.com> > Fixes: 0ff3324da2 ("ixgbe: rework vector pmd following mbuf changes")
Acked-by: Bruce Richardson <bruce.richardson at intel.com> > --- > lib/librte_pmd_ixgbe/ixgbe_rxtx_vec.c | 3 +++ > 1 file changed, 3 insertions(+) > > diff --git a/lib/librte_pmd_ixgbe/ixgbe_rxtx_vec.c > b/lib/librte_pmd_ixgbe/ixgbe_rxtx_vec.c > index 579bc46..c1b5a78 100644 > --- a/lib/librte_pmd_ixgbe/ixgbe_rxtx_vec.c > +++ b/lib/librte_pmd_ixgbe/ixgbe_rxtx_vec.c > @@ -739,6 +739,9 @@ ixgbe_rxq_vec_setup(struct igb_rx_queue *rxq) > mb_def.buf_len = rxq->mb_pool->elt_size - sizeof(struct rte_mbuf); > mb_def.port = rxq->port_id; > rte_mbuf_refcnt_set(&mb_def, 1); > + > + /* prevent compiler reordering: rearm_data covers previous fields */ > + rte_compiler_barrier(); > rxq->mbuf_initializer = *((uint64_t *)&mb_def.rearm_data); > return 0; > } > -- > 2.1.3 >