On Wed, 13 Dec 2017 22:46:30 +0000 "Liu, Chunmei" <chunmei....@intel.com> wrote:
> Hold on, Let me try another place to fix this issue. > > -----Original Message----- > From: Stephen Hemminger [mailto:step...@networkplumber.org] > Sent: Wednesday, December 13, 2017 1:31 PM > To: Liu, Chunmei <chunmei....@intel.com> > Cc: dev@dpdk.org > Subject: Re: [dpdk-dev] [PATCH] fix ceph async messenger runtime bug based on > spdk/dpdk > > On Wed, 13 Dec 2017 11:32:32 -0800 > chunmei Liu <chunmei....@intel.com> wrote: > > > diff --git a/drivers/net/ixgbe/ixgbe_rxtx.c > > b/drivers/net/ixgbe/ixgbe_rxtx.c index 1e07895..30fdbc1 100644 > > --- a/drivers/net/ixgbe/ixgbe_rxtx.c > > +++ b/drivers/net/ixgbe/ixgbe_rxtx.c > > @@ -1589,6 +1589,7 @@ ixgbe_rx_alloc_bufs(struct ixgbe_rx_queue *rxq, bool > > reset_mbuf) > > } > > > > rte_mbuf_refcnt_set(mb, 1); > > + mb->next = NULL; > > mb->data_off = RTE_PKTMBUF_HEADROOM; > > > > This will have measurable performance impact because the next pointer is on > the second cache line. Please do not do top posting on open source mailing lists.
