linux-kernel - Re: [RFC PATCH] memory driver: make phys_index/end_phys_index reflect the start/end section number

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Date:	Tue, 08 Apr 2014 13:23:08 -0500
From:	Nathan Fontenot <nfont@...ux.vnet.ibm.com>
To:	Dave Hansen <dave.hansen@...el.com>,
	Li Zhong <zhong@...ux.vnet.ibm.com>,
	Yasuaki Ishimatsu <isimatu.yasuaki@...fujitsu.com>
CC:	LKML <linux-kernel@...r.kernel.org>, gregkh@...uxfoundation.org,
	Andrew Morton <akpm@...ux-foundation.org>,
	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>,
	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>,
	Zhang Yanfei <zhangyanfei@...fujitsu.com>
Subject: Re: [RFC PATCH] memory driver: make phys_index/end_phys_index reflect
 the start/end section number

On 04/08/2014 11:13 AM, Dave Hansen wrote:
> On 04/08/2014 01:27 AM, Li Zhong wrote:
>> If Dave and others don't have further objections, it seems this small
>> userspace incompatibility could be accepted by most of us, and I don't
>> need to make a version 2. 
> 
> Let me ask another question then.  What are the units of
> phys_index/end_phys_index?  How do we expose those units to userspace?
>

The documentation for these files just states that the files contain
the first and last section id of memory in the memory block for
phys_index and end_phys_index respectively.

I'm not sure the values have ever been units of anything, at least not
that I remember.

-Nathan
 

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