["RFC PATCH" 1/2] powerpc/mm: Fix node look up with numa=off boot

[Nathan Lynch]

Michael Ellerman <mpe at ellerman.id.au> writes:
> Nathan Lynch <nathanl at linux.ibm.com> writes:
>> "Aneesh Kumar K.V" <aneesh.kumar at linux.ibm.com> writes:
>>>> Just checking: do people still need numa=off? Seems like it's a
>>>> maintenance burden :-)
>>>> 
>>>
>>> That is used in kdump kernel.
>>
>> I see, thanks.
>
> That doesn't mean it's a good idea :)
>
> Does it actually reduce memory usage much? Last time I dug into the
> kdump kernel's usage of weird command line flags none of them really did
> anything useful.

I think it's intended to work around bugs in numa initialization, e.g.

https://www.suse.com/support/kb/doc/?id=7023399

Hopefully the original bug with numa/kdump interaction has been fixed?