linux-kernel - Re: [PATCH 5/8] mm: Let sparse_{add,remove}_one_section receive a node

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Message-ID: <1425667392.32009.8.camel@theros.lm.intel.com>
Date:	Fri, 06 Mar 2015 11:43:12 -0700
From:	Ross Zwisler <ross.zwisler@...ux.intel.com>
To:	Boaz Harrosh <boaz@...xistor.com>
Cc:	Ingo Molnar <mingo@...hat.com>, x86@...nel.org,
	linux-kernel <linux-kernel@...r.kernel.org>,
	"Roger C. Pao" <rcpao.enmotus@...il.com>,
	Dan Williams <dan.j.williams@...el.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	linux-nvdimm <linux-nvdimm@...ts.01.org>,
	"H. Peter Anvin" <hpa@...or.com>,
	Matthew Wilcox <willy@...ux.intel.com>,
	Andy Lutomirski <luto@...capital.net>,
	Christoph Hellwig <hch@...radead.org>
Subject: Re: [PATCH 5/8] mm: Let sparse_{add,remove}_one_section receive a
 node_id

On Thu, 2015-03-05 at 13:58 +0200, Boaz Harrosh wrote:
> From: Yigal Korman <yigal@...xistor.com>
> 
> Refactored the arguments of sparse_add_one_section / sparse_remove_one_section
> to use node id instead of struct zone * - A memory section has no direct
> connection to zones, all that was needed from zone was the node id.
> 
> This is for add_persistent_memory that will want a section of pages
> allocated but without any zone associated. This is because belonging
> to a zone will give the memory to the page allocators, but
> persistent_memory belongs to a block device, and is not available for
> regular volatile usage.
> 
> Signed-off-by: Yigal Korman <yigal@...xistor.com>
> Signed-off-by: Boaz Harrosh <boaz@...xistor.com>
> ---
>  include/linux/memory_hotplug.h | 4 ++--
>  mm/memory_hotplug.c            | 4 ++--
>  mm/sparse.c                    | 9 +++++----
>  3 files changed, 9 insertions(+), 8 deletions(-)

For both of the MM patches in this series (this one, 5/8, and the next one,
6/8), please be sure and CC the MM folks.  I know that Dave Hansen had
feedback on an earlier version of this patch:

https://lkml.org/lkml/2014/9/9/742

We need to make sure that feedback is addressed.

Thanks,
- Ross


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