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From:   Dave Hansen <dave.hansen@intel.com>
Subject: Re: [PATCH 6/6] mm/migrate: export whether or not node is toptier in
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On 4/16/22 20:49, Davidlohr Bueso wrote:
> This allows userspace to know if the node is considered fast
> memory (with CPUs attached to it). While this can be already
> derived without a new file, this helps further encapsulate the
> concept.

What is userspace supposed to *do* with this, though?

What does "attached" mean?

Isn't it just asking for trouble to add (known) redundancy to the ABI?
It seems like a recipe for future inconsistency.