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Subject: Re: [PATCH v3 0/3] create sysfs representation of ACPI HMAT
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From: Dave Hansen <dave.hansen@intel.com>
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Date: Fri, 22 Dec 2017 09:13:59 -0800
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To: Anshuman Khandual <khandual@linux.vnet.ibm.com>, Ross Zwisler <ross.zwisler@linux.intel.com>, linux-kernel@vger.kernel.org
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On 12/21/2017 07:09 PM, Anshuman Khandual wrote:
> I had presented a proposal for NUMA redesign in the Plumbers Conference this
> year where various memory devices with different kind of memory attributes
> can be represented in the kernel and be used explicitly from the user space.
> Here is the link to the proposal if you feel interested. The proposal is
> very intrusive and also I dont have a RFC for it yet for discussion here.

I think that's the best reason to "re-use NUMA" for this: it's _not_
intrusive.

Also, from an x86 perspective, these HMAT systems *will* be out there.
Old versions of Linux *will* see different types of memory as separate
NUMA nodes.  So, if we are going to do something different, it's going
to be interesting to un-teach those systems about using the NUMA APIs
for this.  That ship has sailed.
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