From: Andy Whitcroft <apw@shadowen.org>
To: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: Dave Hansen <haveblue@us.ibm.com>,
lhms <lhms-devel@lists.sourceforge.net>,
linux-mm <linux-mm@kvack.org>
Subject: Re: [Lhms-devel] [RFC] consistency of zone->zone_start_pfn, spanned_pages
Date: Tue, 17 May 2005 13:32:51 +0100 [thread overview]
Message-ID: <4289E473.1090404@shadowen.org> (raw)
In-Reply-To: <42893D7C.6070907@jp.fujitsu.com>
KAMEZAWA Hiroyuki wrote:
> How about removing zone_start_pfn and spanned_pages ?
>
> I found they are used in
> bad_range() in page_alloc.c
> mark_free_page() in CONFIG_PM.
>
> And I think we can remove them with section-range-ops when
> CONFIG_SPARSEMEM=y.
> They are used in some another places ?
This needs careful thought as we use bad_range in __free_pages_bulk() in
a non-debug form to work out whether a free'd page is a member of a zone
when trying to pair it with its buddy. Take for instance ZONE_DMA on
typical x86 hardware which has 0 complete MAX_ORDER buddies within.
-apw
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prev parent reply other threads:[~2005-05-17 12:32 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-05-13 16:00 Dave Hansen
2005-05-13 18:24 ` Robin Holt
2005-05-13 18:31 ` Dave Hansen
2005-05-17 9:50 ` Andy Whitcroft
2005-05-17 10:46 ` Robin Holt
2005-05-17 0:40 ` [Lhms-devel] " KAMEZAWA Hiroyuki
2005-05-17 5:43 ` Yasunori Goto
2005-05-17 12:32 ` Andy Whitcroft [this message]
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