** Tags removed: targetmilestone-inin16042
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https://bugs.launchpad.net/bugs/1638515
Title:
Ubuntu 16.04.1: numactl failed when trying to specify n
** Changed in: numactl (Ubuntu)
Status: New => Invalid
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Title:
Ubuntu 16.04.1: numactl failed when trying to specify node with
netdev:de
You're welcome! Note that there is an opportunity here (distro agnostic)
for someone to write up an article explaining when numactl goes wrong
(and why) in cases like this. I think they are seen more often on Power
(due to LPARs).
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I think the -1 means that we were unable to parse the OF representation
of the NUMA node. I'd have to refresh my memory on the powerpc NUMA
code, it might be faster to ask the Ozlabs folks.
-Nish
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Note that LPAR is so broken as far as affinity goes that I don't think
any invocation of numactl on it makes sense. You have one node with all
CPUs and one node with all memory. By definition, you will need to
fallback to node 0 to run and to node 1 to allocate memory, so don't
bother using numactl
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
Unfortunately numactl/libnuma is historically quite bad at making it
easy to debug these kind of issues.
Algorithmically, numactl does the following:
If a /sys/class/net/ symlink is found and the target matches
'/devices/pci[0-9a-fA-F:/]+\\.[0-9]+)/', it then tries to parse /sys//numa_node
If th
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Title:
Ubuntu 16.04.1: numactl failed when trying to specify n
