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

Nathan Lynch nathanl at linux.ibm.com
Wed Jul 10 00:56:34 AEST 2019

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.


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

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