linux-kernel - Re: [Linux-nvdimm] [PATCH 2/3] x86: add a is_e820

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Message-ID: <CAPcyv4gikQO88mCa=DnBKSxbSZkheYVmvKjRERdEccL=v0uAMA@mail.gmail.com>
Date:	Wed, 25 Mar 2015 19:15:42 -0700
From:	Dan Williams <dan.j.williams@...el.com>
To:	Christoph Hellwig <hch@....de>
Cc:	linux-nvdimm <linux-nvdimm@...1.01.org>,
	linux-fsdevel <linux-fsdevel@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	X86 ML <x86@...nel.org>, Jens Axboe <axboe@...nel.dk>
Subject: Re: [Linux-nvdimm] [PATCH 2/3] x86: add a is_e820_ram() helper

On Wed, Mar 25, 2015 at 9:04 AM, Christoph Hellwig <hch@....de> wrote:
> This will allow to deal with persistent memory which needs to be
> treated like ram in many, but not all cases.

Random thought, type-12 memory happens to correspond to "legacy"
NVDIMM systems with smaller capacities.  Perhaps "new NVDIMM" should
not be is_e820_ram() by default?

> Based on an earlier patch from Dave Jiang <dave.jiang@...el.com>.

...which was based on an earlier patch by me, its been nearly 4 years
to come full circle.
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