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handle kernelcore=: generic

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This patch adds the kernelcore= parameter for x86.

Once all patches are applied, a new command-line parameter exist and a new
sysctl.  This patch adds the necessary documentation.

From: Yasunori Goto <y-goto@jp.fujitsu.com>

  When "kernelcore" boot option is specified, kernel can't boot up on ia64
  because of an infinite loop.  In addition, the parsing code can be handled
  in an architecture-independent manner.

  This patch uses common code to handle the kernelcore= parameter.  It is
  only available to architectures that support arch-independent zone-sizing
  (i.e.  define CONFIG_ARCH_POPULATES_NODE_MAP).  Other architectures will
  ignore the boot parameter.

[bunk@stusta.de: make cmdline_parse_kernelcore() static]
Signed-off-by: Mel Gorman <mel@csn.ul.ie>
Signed-off-by: Yasunori Goto <y-goto@jp.fujitsu.com>
Acked-by: Andy Whitcroft <apw@shadowen.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Mel Gorman
2007-07-17 04:03:14 -07:00
committed by Linus Torvalds
parent 396faf0303
commit ed7ed36517
6 changed files with 38 additions and 3 deletions
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5
mm/page_alloc.c
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@@ -3416,7 +3416,7 @@ void __init free_area_init_nodes(unsigned long *max_zone_pfn)
* kernelcore=size sets the amount of memory for use for allocations that
* cannot be reclaimed or migrated.
*/
int __init cmdline_parse_kernelcore(char *p)
static int __init cmdline_parse_kernelcore(char *p)
{
unsigned long long coremem;
if (!p)
@@ -3430,6 +3430,9 @@ int __init cmdline_parse_kernelcore(char *p)
return 0;
}
early_param("kernelcore", cmdline_parse_kernelcore);
#endif /* CONFIG_ARCH_POPULATES_NODE_MAP */
/**