linux-kernel - Re: [PATCH] docs/mm: Physical Memory: add example of interleaving nodes

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Message-ID: <Y+eMlVmn7uXslV7O@kernel.org>
Date:   Sat, 11 Feb 2023 14:39:49 +0200
From:   Mike Rapoport <rppt@...nel.org>
To:     Bagas Sanjaya <bagasdotme@...il.com>
Cc:     Jonathan Corbet <corbet@....net>,
        Andrew Morton <akpm@...ux-foundation.org>,
        David Hildenbrand <david@...hat.com>,
        Johannes Weiner <hannes@...xchg.org>,
        Lorenzo Stoakes <lstoakes@...il.com>,
        "Matthew Wilcox (Oracle)" <willy@...radead.org>,
        Mel Gorman <mgorman@...e.de>, Michal Hocko <mhocko@...nel.org>,
        Vlastimil Babka <vbabka@...e.cz>, linux-doc@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-mm@...ck.org
Subject: Re: [PATCH] docs/mm: Physical Memory: add example of interleaving
 nodes

On Sat, Feb 11, 2023 at 07:31:18PM +0700, Bagas Sanjaya wrote:
> On 2/11/23 17:22, Mike Rapoport wrote:
> > +Note, that memory banks may belong to interleaving nodes. In the example
> > +below an x86 machine has 16Gbytes or RAM in 4 memory banks, even banks
> > +belong to node 0 and odd banks belong to node 1::
> > +
> > +
> > +  0              4G              8G             12G            16G
> > +  +-------------+ +-------------+ +-------------+ +-------------+
> > +  |    node 0   | |    node 1   | |    node 0   | |    node 1   |
> > +  +-------------+ +-------------+ +-------------+ +-------------+
> > +
> > +  0   16M      4G
> > +  +-----+-------+ +-------------+ +-------------+ +-------------+
> > +  | DMA | DMA32 | |    NORMAL   | |    NORMAL   | |    NORMAL   |
> > +  +-----+-------+ +-------------+ +-------------+ +-------------+
> > +
> > +In such case node 0 will span from 0 to 12 Gbytes and node 1 will span from
> > +4 Gbytes to 16 Gbytes.
> > +
> 
> What about "... and node 1 will span from 4 to 16 Gbytes"?
 
Sure.

> -- 
> An old man doll... just what I always wanted! - Clara
> 

-- 
Sincerely yours,
Mike.