RE: [PATCH 1/2] x86: Set up resources correctly on Hyper-V Generation 2

[Matthew Wilcox]

Compared to a patch which removes 5 lines of code, almost any additional work is ocean-boiling.

-----Original Message-----
From: Dan Williams [mailto:dan.j.williams@xxxxxxxxx] 
Sent: Thursday, August 18, 2016 3:12 PM
To: Matthew Wilcox <mawilcox@xxxxxxxxxxxxx>
Cc: X86 ML <x86@xxxxxxxxxx>; linux-kernel@xxxxxxxxxxxxxxx; linux-nvdimm@xxxxxxxxxxxx
Subject: Re: [PATCH 1/2] x86: Set up resources correctly on Hyper-V Generation 2

On Thu, Aug 18, 2016 at 11:26 AM, Matthew Wilcox <mawilcox@xxxxxxxxxxxxx> wrote:
> *Until* such a mechanism is in, I see no reason to not keep feature parity for all platforms.  This is the exact "You should boil the ocean" response that Arjan famously complained about at Kernel Summit a few years ago.

Feature parity for all platforms is the NFIT which Hyper-V is already implementing.

Setting that aside, if we want to fix memmap= for the general case, implementing a table like mBFT does not amount to ocean boiling in my opinion.