Michael Ellerman [off-list ref] writes:

Nathan Lynch [off-list ref] writes:

quoted

"Aneesh Kumar K.V" [off-list ref] writes:

quoted

quoted

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?