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From: "Martin J. Bligh" <Martin.Bligh@us.ibm.com>
To: Mel <mel@csn.ul.ie>
Cc: linux-kernel@vger.kernel.org
Subject: Re: [PATCH] Documenation/vm/numa
Date: Sat, 20 Apr 2002 12:47:53 -0700	[thread overview]
Message-ID: <2948370542.1019306872@[10.10.2.3]> (raw)
In-Reply-To: <Pine.LNX.4.44.0204201703320.3995-100000@skynet>

> + node_start_paddr  The starting physical address of the node. This doesn't
> +		    work really well as an unsigned long as it breaks for
> +                   ia32 with PAE for example. A more suitable solution would be
> +                   to record this as a Page Frame Number (pfn). This could be
> +                   trivially defined as (page_phys_addr >> PAGE\_SHIFT).

This looks fine.

> +                   Alternatively, it could be the struct page * index inside
> +                   mem_map.

But I'd just omit this last sentence ... that only works for machines 
with a contig mem_map (not NUMA), and it's kind of an accidental
kludge that happens to work in some cases, not the proper definition
(what I originally posted was confusing).

I actually submitted a patch a couple of days ago to fix these to
a pfn instead. If that gets in, we can update the documentation then.

M.

      reply	other threads:[~2002-04-20 19:47 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2002-04-19  3:56 Mel
2002-04-19  5:18 ` Martin J. Bligh
2002-04-19 20:25   ` Eric W. Biederman
2002-04-19 21:37     ` Martin J. Bligh
2002-04-20 16:05       ` Mel
2002-04-20 19:47         ` Martin J. Bligh [this message]

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