From: Christoph Lameter <clameter@sgi.com>
To: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: linux-mm@kvack.org, linux-ia64@vger.kernel.org
Subject: Re: [RFC] virtual memmap for sparsemem [1/2] arch independent part
Date: Thu, 19 Oct 2006 19:26:33 -0700 (PDT) [thread overview]
Message-ID: <Pine.LNX.4.64.0610191925180.12581@schroedinger.engr.sgi.com> (raw)
In-Reply-To: <20061020110618.6423d0e4.kamezawa.hiroyu@jp.fujitsu.com>
On Fri, 20 Oct 2006, KAMEZAWA Hiroyuki wrote:
> By the way, we have to make sizeof(struct page) as (1 << x) aligned size to use
> large-sized page. (IIRC, my gcc-3.4.3 says it is 56bytes....)
Having it 1 << x would be useful to simplify the pfn_valid check but
you can also check the start and the end of the page struct to allow the
page struct cross a page boundary. See the ia64 virtual memmap
implementation of pfn_valid.
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next prev parent reply other threads:[~2006-10-20 2:26 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-10-19 8:21 KAMEZAWA Hiroyuki
2006-10-19 15:16 ` Andy Whitcroft
2006-10-19 16:43 ` Christoph Lameter
2006-10-20 1:00 ` KAMEZAWA Hiroyuki
2006-10-19 16:39 ` Christoph Lameter
2006-10-20 1:18 ` KAMEZAWA Hiroyuki
2006-10-20 1:42 ` Christoph Lameter
2006-10-20 2:06 ` KAMEZAWA Hiroyuki
2006-10-20 2:26 ` Christoph Lameter [this message]
2006-10-20 16:20 ` Luck, Tony
2006-11-21 11:37 ` Heiko Carstens
2006-11-21 12:19 ` KAMEZAWA Hiroyuki
2006-11-21 12:19 ` Heiko Carstens
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