linux-kernel - [PATCH 1/13] ia64: parse kernel parameter hugepagesz= in early boot

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Date:	Mon, 10 Sep 2007 12:20:31 +0100 (IST)
From:	Mel Gorman <mel@....ul.ie>
To:	akpm@...ux-foundation.org
Cc:	Mel Gorman <mel@....ul.ie>, linux-kernel@...r.kernel.org,
	linux-mm@...ck.org
Subject: [PATCH 1/13] ia64: parse kernel parameter hugepagesz= in early boot

Subject: ia64: parse kernel parameter hugepagesz= in early boot

Parse hugepagesz with early_param() instead of __setup().  __setup()
is called after the memory allocator has been initialised and the
pageblock bitmaps already setup.  In tests on one IA64 there did not
seem to be any problem with using early_param() and in fact may be
more correct as it guarantees the parameter is handled before the
parsing of hugepages=.

Signed-off-by: Mel Gorman <mel@....ul.ie>
Acked-by: Andy Whitcroft <apw@...dowen.org>
Acked-by: Christoph Lameter <clameter@....com>
Signed-off-by: Andrew Morton <akpm@...ux-foundation.org>
---

 arch/ia64/Kconfig          |    5 +++++
 arch/ia64/mm/hugetlbpage.c |    4 ++--
 2 files changed, 7 insertions(+), 2 deletions(-)

diff -rup -X /usr/src/patchset-0.6/bin//dontdiff linux-2.6.23-rc5-clean/arch/ia64/Kconfig linux-2.6.23-rc5-001-ia64-parse-kernel-parameter-hugepagesz=-in-early-boot/arch/ia64/Kconfig
--- linux-2.6.23-rc5-clean/arch/ia64/Kconfig	2007-09-01 07:08:24.000000000 +0100
+++ linux-2.6.23-rc5-001-ia64-parse-kernel-parameter-hugepagesz=-in-early-boot/arch/ia64/Kconfig	2007-09-02 16:18:48.000000000 +0100
@@ -54,6 +54,11 @@ config ARCH_HAS_ILOG2_U64
 	bool
 	default n
 
+config HUGETLB_PAGE_SIZE_VARIABLE
+	bool
+	depends on HUGETLB_PAGE
+	default y
+
 config GENERIC_FIND_NEXT_BIT
 	bool
 	default y
diff -rup -X /usr/src/patchset-0.6/bin//dontdiff linux-2.6.23-rc5-clean/arch/ia64/mm/hugetlbpage.c linux-2.6.23-rc5-001-ia64-parse-kernel-parameter-hugepagesz=-in-early-boot/arch/ia64/mm/hugetlbpage.c
--- linux-2.6.23-rc5-clean/arch/ia64/mm/hugetlbpage.c	2007-09-01 07:08:24.000000000 +0100
+++ linux-2.6.23-rc5-001-ia64-parse-kernel-parameter-hugepagesz=-in-early-boot/arch/ia64/mm/hugetlbpage.c	2007-09-02 16:18:48.000000000 +0100
@@ -194,6 +194,6 @@ static int __init hugetlb_setup_sz(char 
 	 * override here with new page shift.
 	 */
 	ia64_set_rr(HPAGE_REGION_BASE, hpage_shift << 2);
-	return 1;
+	return 0;
 }
-__setup("hugepagesz=", hugetlb_setup_sz);
+early_param("hugepagesz", hugetlb_setup_sz);
-
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