>From aebc336baa7ec2d4ccb6f21166770c7d2ee26cba Mon Sep 17 00:00:00 2001
From: jzha144 <jun.zh...@intel.com>
Date: Wed, 31 Oct 2012 08:51:18 +0800
Subject: [PATCH] To crash dump, we need keep other memory type except
E820_RAM, because other type come from BIOS or firmware is
used by other code(for example: PCI_MMCONFIG).
Signed-off-by: jzha144 <jun.zh...@intel.com>
---
arch/x86/kernel/e820.c | 9 +++++++++
1 files changed, 9 insertions(+), 0 deletions(-)
diff --git a/arch/x86/kernel/e820.c b/arch/x86/kernel/e820.c
index df06ade..8760427 100644
--- a/arch/x86/kernel/e820.c
+++ b/arch/x86/kernel/e820.c
@@ -851,6 +851,15 @@ static int __init parse_memmap_opt(char *p)
* reset.
*/
saved_max_pfn = e820_end_of_ram_pfn();
+
+ /*
+ * To CRASH DUMP, only remove E820_RAM.
+ * some other memory typecome from BIOS or firmware,
+ * it must be same with system kernel.
+ */
+ e820_remove_range(0, ULLONG_MAX, E820_RAM, 1);
+ userdef = 1;
+ return 0;
#endif
e820.nr_map = 0;
userdef = 1;
--
1.7.6
--
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