[PATCH 3/8] x86 - Specify amount of kernel memory at boot time

[Mel Gorman]

This patch adds the kernelcore= parameter for x86.

Signed-off-by: Mel Gorman <mel@xxxxxxxxx>
diff -rup -X /usr/src/patchset-0.6/bin//dontdiff linux-2.6.17-rc3-mm1-zonesizing-102_addzone/arch/i386/kernel/setup.c linux-2.6.17-rc3-mm1-zonesizing-103_x86coremem/arch/i386/kernel/setup.c
--- linux-2.6.17-rc3-mm1-zonesizing-102_addzone/arch/i386/kernel/setup.c	2006-05-03 09:42:16.000000000 +0100
+++ linux-2.6.17-rc3-mm1-zonesizing-103_x86coremem/arch/i386/kernel/setup.c	2006-05-03 09:47:22.000000000 +0100
@@ -943,6 +943,18 @@ static void __init parse_cmdline_early (
 		else if (!memcmp(from, "vmalloc=", 8))
 			__VMALLOC_RESERVE = memparse(from+8, &from);
 
+		/*
+		 * kernelcore=size sets the amount of memory for use for
+		 * kernel allocations that cannot be reclaimed easily.
+		 * The remaining memory is set aside for easy reclaim
+		 * for features like memory remove or huge page allocations
+		 */
+		else if (!memcmp(from, "kernelcore=",11)) {
+			unsigned long core_pages;
+			core_pages = memparse(from+11, &from) >> PAGE_SHIFT;
+			set_required_kernelcore(core_pages);
+		}
+
 	next_char:
 		c = *(from++);
 		if (!c)
-
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