linux-kernel - Re: [Linux-nvdimm] [PATCH 0/2] e820: Fix handling of NvDIMM chips

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Date:	Thu, 19 Feb 2015 11:01:51 +0100
From:	Ingo Molnar <mingo@...nel.org>
To:	Dan Williams <dan.j.williams@...el.com>
Cc:	Christoph Hellwig <hch@...radead.org>,
	Boaz Harrosh <boaz@...xistor.com>,
	Matthew Wilcox <willy@...ux.intel.com>,
	Ingo Molnar <mingo@...hat.com>,
	Ross Zwisler <ross.zwisler@...ux.intel.com>, x86@...nel.org,
	linux-kernel <linux-kernel@...r.kernel.org>,
	"Roger C. Pao" <rcpao.enmotus@...il.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	linux-nvdimm <linux-nvdimm@...1.01.org>,
	"H. Peter Anvin" <hpa@...or.com>
Subject: Re: [Linux-nvdimm] [PATCH 0/2] e820: Fix handling of NvDIMM chips


* Dan Williams <dan.j.williams@...el.com> wrote:

> On Wed, Feb 18, 2015 at 4:47 PM, Christoph Hellwig <hch@...radead.org> wrote:
> > On Wed, Feb 18, 2015 at 10:15:32AM -0800, Dan Williams wrote:
> >> In fact it was originally "type-6" until ACPI 5 
> >> claimed that number for official use, so these 
> >> platforms, with early proof-of-concept nvdimm support, 
> >> have already gone through one transition to a new 
> >> number.  They need to do the same once an official 
> >> number for nvdimm support is published.
> >>
> >> Put another way, these early platforms are already 
> >> using out-of-tree patches for nvdimm enabling.  They 
> >> can continue to do so, or switch to standard methods 
> >> when the standard is published.
> >
> > Not supporting hardware that is widely avaiable (I have 
> > some, too) is not very user friendly.
> 
> Yes, as I agreed with Ingo, allowing a driver to assume 
> control of an unknown memory type with a warning or a 
> kernel taint seems fine.

If someone cooks up such a patch I can apply it.

Thanks,

	Ingo
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