Ok, so I think this is not exactly a bug, maybe a usability issue
upstream?
Note also that the error message now reported ("Cannot read node mask
for device", sysfs_node_read returning -1) is different than before
("Kernel does not know node mask for device", sysfs_node_read returning
-2)
In any case, you've told numactl to use --cpunodebind=<node of a network
device>, but that <node of a network device> has no CPUs, so numactl
can't bind to it?
In the code, I believe numprocnode to be 0 (as node 0 is the highest
node with CPUs) and
if (num >= numa_num_task_nodes())
return -1;
is probably being tripped in sysfs_node_read. As with all things
numactl, it needs some love to be more user-friendly.
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https://bugs.launchpad.net/bugs/1638515
Title:
Ubuntu 16.04.1: numactl failed when trying to specify node with
netdev:dev
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