Re: [PATCH 5/6] Have ia64 use add_active_range() and free_area_init_nodes

diff -rup -X /usr/src/patchset-0.5/bin//dontdiff linux-2.6.17-rc4-mm4-clean/mm/page_alloc.c linux-2.6.17-rc4-mm4-ia64_force_alignment/mm/page_alloc.c
--- linux-2.6.17-rc4-mm4-clean/mm/page_alloc.c	2006-05-15 10:37:55.000000000 +0100
+++ linux-2.6.17-rc4-mm4-ia64_force_alignment/mm/page_alloc.c	2006-05-15 13:10:42.000000000 +0100
@@ -2640,14 +2640,20 @@ void __init free_area_init_nodes(unsigne
{
	unsigned long nid;
	int zone_index;
+	unsigned long lowest_pfn = find_min_pfn_with_active_regions();
+
+	lowest_pfn = zone_boundary_align_pfn(lowest_pfn);
+	arch_max_dma_pfn = zone_boundary_align_pfn(arch_max_dma_pfn);
+	arch_max_dma32_pfn = zone_boundary_align_pfn(arch_max_dma32_pfn);
+	arch_max_low_pfn = zone_boundary_align_pfn(arch_max_low_pfn);
+	arch_max_high_pfn = zone_boundary_align_pfn(arch_max_high_pfn);

	/* Record where the zone boundaries are */
	memset(arch_zone_lowest_possible_pfn, 0,
				sizeof(arch_zone_lowest_possible_pfn));
	memset(arch_zone_highest_possible_pfn, 0,
				sizeof(arch_zone_highest_possible_pfn));
-	arch_zone_lowest_possible_pfn[ZONE_DMA] =
-					find_min_pfn_with_active_regions();
+	arch_zone_lowest_possible_pfn[ZONE_DMA] = lowest_pfn;
	arch_zone_highest_possible_pfn[ZONE_DMA] = arch_max_dma_pfn;
	arch_zone_highest_possible_pfn[ZONE_DMA32] = arch_max_dma32_pfn;
	arch_zone_highest_possible_pfn[ZONE_NORMAL] = arch_max_low_pfn;

Ok, this patch is broken in a number of ways. It doesn't help the IA64 problem at all and two other machine configurations failed with the patch applied during regression testing. Please drop and I'll figure out what the correct solution is to your IA64 machine not booting.

--
Mel Gorman
Part-time Phd Student                          Linux Technology Center
University of Limerick                         IBM Dublin Software Lab
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---

• References:
  • [PATCH 0/6] Sizing zones and holes in an architecture independent manner V6
    • From: Mel Gorman <[email protected]>
  • [PATCH 5/6] Have ia64 use add_active_range() and free_area_init_nodes
    • From: Mel Gorman <[email protected]>
  • Re: [PATCH 5/6] Have ia64 use add_active_range() and free_area_init_nodes
    • From: Andrew Morton <[email protected]>
  • Re: [PATCH 5/6] Have ia64 use add_active_range() and free_area_init_nodes
    • From: [email protected] (Mel Gorman)

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