linux-kernel - Re: [Linux-nvdimm] [PATCH v2 01/20] e820, efi: add ACPI 6.0 persistent memory types

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Message-ID: <CAPcyv4iBu5xawFcLcjSKW-hDSyvCkPAUonMuaMFS0g5e4rWsmQ@mail.gmail.com>
Date:	Fri, 15 May 2015 08:48:18 -0700
From:	Dan Williams <dan.j.williams@...el.com>
To:	Jeff Moyer <jmoyer@...hat.com>
Cc:	linux-nvdimm <linux-nvdimm@...1.01.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Ingo Molnar <mingo@...nel.org>, Jens Axboe <axboe@...com>,
	Borislav Petkov <bp@...en8.de>,
	"H. Peter Anvin" <hpa@...or.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Andy Lutomirski <luto@...capital.net>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Christoph Hellwig <hch@....de>
Subject: Re: [Linux-nvdimm] [PATCH v2 01/20] e820, efi: add ACPI 6.0
 persistent memory types

On Fri, May 15, 2015 at 8:43 AM, Jeff Moyer <jmoyer@...hat.com> wrote:
> Dan Williams <dan.j.williams@...el.com> writes:
>
>> @@ -919,10 +920,31 @@ static inline const char *e820_type_to_string(int e820_type)
>>       case E820_NVS:  return "ACPI Non-volatile Storage";
>>       case E820_UNUSABLE:     return "Unusable memory";
>>       case E820_PRAM: return "Persistent RAM";
>> +     case E820_PMEM: return "Persistent I/O Memory";
>
> Minor nit, but nobody refers to this stuff as persistent I/O memory.
> I've heard it referred to as persistent memory or storage class memory.
> In the end, I doubt it matters.

Had we not polluted the waters with E820_PRAM I would have chosen
"Persistent Memory", but as we now need to support both I'd assume
they need different names.

> Acked-by: Jeff Moyer <jmoyer@...hat.com>

Thanks Jeff.
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