From: ebiederm@xmission.com (Eric W. Biederman)
To: "Martin J. Bligh" <Martin.Bligh@us.ibm.com>
Cc: Mel <mel@csn.ul.ie>, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] Documenation/vm/numa
Date: 19 Apr 2002 14:25:50 -0600 [thread overview]
Message-ID: <m1n0vz4er5.fsf@frodo.biederman.org> (raw)
In-Reply-To: <Pine.LNX.4.44.0204190448070.8173-100000@skynet> <2809819807.1019168322@[10.10.2.3]>
"Martin J. Bligh" <Martin.Bligh@us.ibm.com> writes:
>
> Note that there are two possible ways to define a pfn, in my mind.
> One would be page_phys_addr >> PAGE_SHIFT. The other would be the
> offset of the struct page for that page within the mythical mem_map
> array. I prefer the former, though it probably contradicts everyone
> else ;-) It's useful to have some way to pass around a 36 bit address
> inside a 32 bit field.
A page frame number (pfn) is definitely the former
(page_phys_addr >> PAGE_SHIFT).
Eric
next prev parent reply other threads:[~2002-04-19 20:33 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-04-19 3:56 [PATCH] Documenation/vm/numa Mel
2002-04-19 5:18 ` Martin J. Bligh
2002-04-19 20:25 ` Eric W. Biederman [this message]
2002-04-19 21:37 ` Martin J. Bligh
2002-04-20 16:05 ` Mel
2002-04-20 19:47 ` Martin J. Bligh
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