[dpdk-dev] [PATCH 4/6] examples/ntb: enable an example for ntb

[Li, Xiaoyun]

> 
> Yes, I agree, but I don't think it is the case here.
> 
> >It will cause segment fault in enqueue/dequeue.
> 
> Hmm, have you debug it? Which line caused the segfault?
> 
> You can refer to test_rawdev_enqdeq function in skeleton_rawdev_test.c, what
> it does is similar to my suggestion, and you just need one alloc/free.
> 
Of course I debug on it. It will cause seg fault at rte_memcpy. Because buffers[0]->buf_addr is not right.
You can see the debug log.
(gdb) p test_pkts_send[0].buf_addr
$3 = (void *) 0x5555562784c0
(gdb) n
164             rte_rawdev_set_attr(dev_id, "spad14", val);
(gdb)
ntb_attr_set(): Set attribute (spad14) Value (0)
165             val = size;
(gdb)
166             rte_rawdev_set_attr(dev_id, "spad15", val);
(gdb)
ntb_attr_set(): Set attribute (spad15) Value (35)
175             rte_rawdev_enqueue_buffers(dev_id, (struct rte_rawdev_buf **)&test_pkts_send, 1, (void *)size);
(gdb)

Thread 1 "ntb_fwd" hit Breakpoint 2, ntb_enqueue_bufs (dev=0x555556023b80 <rte_rawdevices>, buffers=0x7fffffff7fe0, count=1,
    context=0x23) at /home/xiaoyun/ntb/dpdk-next-net-intel/drivers/raw/ntb_rawdev/ntb_rawdev.c:244
244             struct ntb_hw *hw = dev->dev_private;
(gdb) n
248             if (hw->ntb_ops->get_peer_mw_addr == NULL)
(gdb)
249                     return -ENOTSUP;
(gdb) p buffers[0]->buf_addr
$4 = (void *) 0x6f77206f6c6c6568
(gdb) p &buffers[0]->buf_addr
$5 = (void **) 0x5555562784c0

> Thanks,
> Xiaolong
> 
> >
> >I will free twice.
> >
> >> > >2.17.1
> >> > >