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

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From: Mel Gorman <mel@...>
To: <akpm@...>
Cc: Mel Gorman <mel@...>, <linux-kernel@...>, <linux-mm@...>
Subject: [PATCH 1/13] ia64: parse kernel parameter hugepagesz= in early boot
Date: Monday, September 10, 2007 - 7:20 am

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@csn.ul.ie>
Acked-by: Andy Whitcroft <apw@shadowen.org>
Acked-by: Christoph Lameter <clameter@sgi.com>
Signed-off-by: Andrew Morton <akpm@linux-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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Messages in current thread:
[PATCH 0/13] Reduce external fragmentation by grouping pages..., Mel Gorman, (Mon Sep 10, 7:20 am)
Re: [PATCH 0/13] Reduce external fragmentation by grouping p..., Andrew Morton, (Thu Sep 13, 9:01 pm)
Re: [PATCH 0/13] Reduce external fragmentation by grouping p..., Mel Gorman, (Fri Sep 14, 10:33 am)
Re: [PATCH 0/13] Reduce external fragmentation by grouping p..., Andrew Morton, (Sun Sep 16, 6:34 am)
[PATCH 13/13] Print out statistics in relation to fragmentat..., Mel Gorman, (Mon Sep 10, 7:24 am)
[PATCH 12/13] Be more agressive about stealing when MIGRATE_..., Mel Gorman, (Mon Sep 10, 7:24 am)
[PATCH 11/13] Bias the placement of kernel pages at lower pfns, Mel Gorman, (Mon Sep 10, 7:23 am)
[PATCH 10/13] Bias the location of pages freed for min_free_..., Mel Gorman, (Mon Sep 10, 7:23 am)
[PATCH 9/13] Do not group pages by mobility type on low memo..., Mel Gorman, (Mon Sep 10, 7:23 am)
[PATCH 8/13] Move free pages between lists on steal, Mel Gorman, (Mon Sep 10, 7:22 am)
[PATCH 7/13] Drain per-cpu lists when high-order allocations..., Mel Gorman, (Mon Sep 10, 7:22 am)
Re: [PATCH 7/13] Drain per-cpu lists when high-order allocat..., Nick Piggin, (Mon Sep 10, 11:05 am)
Re: [PATCH 7/13] Drain per-cpu lists when high-order allocat..., Mel Gorman, (Tue Sep 11, 5:34 am)
[PATCH 6/13] Group short-lived and reclaimable kernel alloca..., Mel Gorman, (Mon Sep 10, 7:22 am)
Re: Group short-lived and reclaimable kernel allocations, Paul Jackson, (Mon Sep 10, 3:44 pm)
Re: Group short-lived and reclaimable kernel allocations, Mel Gorman, (Mon Sep 10, 5:15 pm)
[PATCH 5/13] Choose pages from the per cpu list-based on mig..., Mel Gorman, (Mon Sep 10, 7:21 am)
[PATCH 4/13] Split the free lists for movable and unmovable ..., Mel Gorman, (Mon Sep 10, 7:21 am)
[PATCH 3/13] Fix corruption of memmap on ia64-sparsemem when..., Mel Gorman, (Mon Sep 10, 7:21 am)
[PATCH 2/13] Add a bitmap that is used to track flags affect..., Mel Gorman, (Mon Sep 10, 7:20 am)
[PATCH 1/13] ia64: parse kernel parameter hugepagesz= in ear..., Mel Gorman, (Mon Sep 10, 7:20 am)