Re: [PATCH v6] numa: make node_to_cpumask_map() NUMA_NO_NODE aware
From: Peter Zijlstra
Date: Mon Oct 14 2019 - 05:51:03 EST
On Mon, Oct 14, 2019 at 11:25:09AM +0200, Greg KH wrote:
> Good luck, I don't really think that most, if any, of this is needed,
> but hey, it's nice to clean it up where it can be :)
Some of the virtual devices we have (that use devm) really ought to set
the node too, like drivers/base/cpu.c and driver/base/node.c and
arguably the cooling devices too (they create a device per cpu).
The patch I had here:
https://lkml.kernel.org/r/20190925214526.GA4643@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
takes the more radical approach of requiring a node, except when
explicitly marked not (the fake devices that don't use devm for
example).
But yes, PCI and other physical busses really should be having a node
set, no excuses.
Anyway, I don't think non-physical devices actually use
cpumask_of_node() much, a quick grep didn't show any.