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authorHorms <horms@verge.net.au>2007-03-06 02:34:21 -0800
committerTony Luck <tony.luck@intel.com>2007-03-06 14:47:54 -0800
commitf4a570997e71b892805a1e71303d09c327af135f (patch)
tree9fe577e7b97ee7365481489f1c263aa1f868e199
parent25667d675454f2cd258c5fa798a2281af1ef2ae9 (diff)
[IA64] point saved_max_pfn to the max_pfn of the entire system
Make saved_max_pfn point to max_pfn of entire system. Without this patch is so that vmcore is zero length on ia64. This is because saved_max_pfn was wrongly being set to the max_pfn of the crash kernel's address space, rather than the max_pfg on the physical memory of the machine - the whole purpose of vmcore is to access physical memory that is not part of the crash kernel's addresss space. Signed-off-by: Simon Horman <horms@verge.net.au> Signed-off-by: Zou Nan hai <nanhai.zou@intel.com> Sort-Of-Acked-By: Jay Lan <jlan@sgi.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Tony Luck <tony.luck@intel.com>
-rw-r--r--arch/ia64/kernel/efi.c6
-rw-r--r--arch/ia64/mm/contig.c5
-rw-r--r--arch/ia64/mm/discontig.c6
3 files changed, 6 insertions, 11 deletions
diff --git a/arch/ia64/kernel/efi.c b/arch/ia64/kernel/efi.c
index 772ba6fe110f..32ce330cbc64 100644
--- a/arch/ia64/kernel/efi.c
+++ b/arch/ia64/kernel/efi.c
@@ -21,6 +21,7 @@
* Skip non-WB memory and ignore empty memory ranges.
*/
#include <linux/module.h>
+#include <linux/bootmem.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/types.h>
@@ -1009,6 +1010,11 @@ efi_memmap_init(unsigned long *s, unsigned long *e)
} else
ae = efi_md_end(md);
+#ifdef CONFIG_CRASH_DUMP
+ /* saved_max_pfn should ignore max_addr= command line arg */
+ if (saved_max_pfn < (ae >> PAGE_SHIFT))
+ saved_max_pfn = (ae >> PAGE_SHIFT);
+#endif
/* keep within max_addr= and min_addr= command line arg */
as = max(as, min_addr);
ae = min(ae, max_addr);
diff --git a/arch/ia64/mm/contig.c b/arch/ia64/mm/contig.c
index ca4d41e5f177..fb0f4698f5d0 100644
--- a/arch/ia64/mm/contig.c
+++ b/arch/ia64/mm/contig.c
@@ -197,11 +197,6 @@ find_memory (void)
find_initrd();
-#ifdef CONFIG_CRASH_DUMP
- /* If we are doing a crash dump, we still need to know the real mem
- * size before original memory map is reset. */
- saved_max_pfn = max_pfn;
-#endif
}
#ifdef CONFIG_SMP
diff --git a/arch/ia64/mm/discontig.c b/arch/ia64/mm/discontig.c
index 16835108bb5b..11a2d8825d89 100644
--- a/arch/ia64/mm/discontig.c
+++ b/arch/ia64/mm/discontig.c
@@ -480,12 +480,6 @@ void __init find_memory(void)
max_pfn = max_low_pfn;
find_initrd();
-
-#ifdef CONFIG_CRASH_DUMP
- /* If we are doing a crash dump, we still need to know the real mem
- * size before original memory map is reset. */
- saved_max_pfn = max_pfn;
-#endif
}
#ifdef CONFIG_SMP