The patch titled
ia64: point saved_max_pfn to the max_pfn of the entire system
has been added to the -mm tree. Its filename is
ia64-point-saved_max_pfn-to-the-max_pfn-of-the-entire-system.patch
*** Remember to use Documentation/SubmitChecklist when testing your code ***
See http://www.zip.com.au/~akpm/linux/patches/stuff/added-to-mm.txt to find
out what to do about this
------------------------------------------------------
Subject: ia64: point saved_max_pfn to the max_pfn of the entire system
From: Horms <horms@xxxxxxxxxxxx>
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.
Updated for recent changes in Linus' tree.
Signed-off-by: Simon Horman <horms@xxxxxxxxxxxx>
Signed-off-by: Zou Nan hai <nanhai.zou@xxxxxxxxx>
Sort-Of-Acked-By: Jay Lan <jlan@xxxxxxx>
Cc: "Luck, Tony" <tony.luck@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
arch/ia64/kernel/efi.c | 6 ++++++
arch/ia64/mm/contig.c | 5 -----
arch/ia64/mm/discontig.c | 6 ------
3 files changed, 6 insertions(+), 11 deletions(-)
diff -puN arch/ia64/kernel/efi.c~ia64-point-saved_max_pfn-to-the-max_pfn-of-the-entire-system arch/ia64/kernel/efi.c
--- a/arch/ia64/kernel/efi.c~ia64-point-saved_max_pfn-to-the-max_pfn-of-the-entire-system
+++ a/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, unsign
} 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 -puN arch/ia64/mm/contig.c~ia64-point-saved_max_pfn-to-the-max_pfn-of-the-entire-system arch/ia64/mm/contig.c
--- a/arch/ia64/mm/contig.c~ia64-point-saved_max_pfn-to-the-max_pfn-of-the-entire-system
+++ a/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 -puN arch/ia64/mm/discontig.c~ia64-point-saved_max_pfn-to-the-max_pfn-of-the-entire-system arch/ia64/mm/discontig.c
--- a/arch/ia64/mm/discontig.c~ia64-point-saved_max_pfn-to-the-max_pfn-of-the-entire-system
+++ a/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
_
Patches currently in -mm which might be from horms@xxxxxxxxxxxx are
origin.patch
git-ia64.patch
ia64-point-saved_max_pfn-to-the-max_pfn-of-the-entire-system.patch
-
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