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[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>
This commit is contained in:
Horms 2007-03-06 02:34:21 -08:00 committed by Tony Luck
parent 25667d6754
commit f4a570997e
3 changed files with 6 additions and 11 deletions
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6
arch/ia64/kernel/efi.c
View File

@ -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);

5
arch/ia64/mm/contig.c
View File

@ -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

6
arch/ia64/mm/discontig.c
View File

@ -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