debug notes for https://github.com/luigirizzo/netmap/issues/189

notes

pkt-get on eth0
```
[  171.678486] 373.942625 [3255] netmap_init               run mknod /dev/netmap c 10 53 # error 0
[  171.678530] netmap: loaded module
[  191.078585] 393.342827 [1190] generic_netmap_attach     Created generic NA ffff8801f913b000 (prev           (null))
[  191.112529] 393.376778 [2013] netmap_do_regif           lut ffffc90000ffb000 bufs 163840 size 2048
[  191.112579] 393.376827 [ 390] generic_netmap_register   Generic adapter ffff8801f913b000 goes on
[  191.112615] 393.376862 [ 441] generic_netmap_register   RX ring 0 of generic adapter ffff8801f913b000 goes on
[  191.112652] 393.376897 [ 451] generic_netmap_register   TX ring 0 of generic adapter ffff8801f913b000 goes on
[  191.113897] 393.378080 [ 475] generic_qdisc_init        Qdisc #0 initialized with max_len = 1024
[  195.116562] 397.380813 [ 286] generic_netmap_unregister Generic adapter ffff8801f913b000 goes off
[  195.116623] 397.380874 [ 305] generic_netmap_unregister RX ring 0 of generic adapter ffff8801f913b000 goes off
[  195.116667] 397.380916 [ 323] generic_netmap_unregister TX ring 0 of generic adapter ffff8801f913b000 goes off
[  195.117204] 397.381426 [1118] generic_netmap_dtor       Restored native NA           (null)
r
```
eth0^ without my != -> == patch
```
[ 3626.267071] 358.915810 [1190] generic_netmap_attach     Created generic NA ffff8801f6ffa000 (prev           (null))
[ 3626.323267] 358.971985 [2013] netmap_do_regif           lut ffffc90000ff8000 bufs 163840 size 2048
[ 3626.323319] 358.972037 [ 390] generic_netmap_register   Generic adapter ffff8801f6ffa000 goes on
[ 3626.323371] 358.972087 [ 475] generic_qdisc_init        Qdisc #0 initialized with max_len = 1024
[ 3634.334195] 366.983047 [1118] generic_netmap_dtor       Restored native NA           (null)

```

eth0^ with my != -> == patch
```
[  803.142116] 182.307000 [1190] generic_netmap_attach     Created generic NA ffff8801f905b800 (prev           (null))
[  803.196215] 182.361194 [2013] netmap_do_regif           lut ffffc90000fd2000 bufs 163840 size 2048
[  803.196267] 182.361251 [ 390] generic_netmap_register   Generic adapter ffff8801f905b800 goes on
[  803.196317] 182.361298 [ 475] generic_qdisc_init        Qdisc #0 initialized with max_len = 1024
[  812.204965] 191.369933 [1102] generic_netmap_dtor       Released generic NA ffff8801f905b800
[  812.204998] 191.369967 [1118] generic_netmap_dtor       Restored native NA           (null)
```


```

Thats cool; I've made some progress (posted in the bug since its definitely useful :)). I'm off to sleep now :)