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authorMagnus Damm <magnus@valinux.co.jp>2006-11-14 16:57:46 +0100
committerAndi Kleen <andi@basil.nowhere.org>2006-11-14 16:57:46 +0100
commit15803a43288da434d34d41c4ed650c3c1728d42c (patch)
tree6294e8d6a95e329c6cae85ff07f0e2459e76971d
parent5e58a02a8f6a7a1c9ae41f39286bcd3aea0d6f24 (diff)
downloadlinux-15803a43288da434d34d41c4ed650c3c1728d42c.tar.bz2
[PATCH] x86-64: setup saved_max_pfn correctly (kdump)
x86_64: setup saved_max_pfn correctly 2.6.19-rc4 has broken CONFIG_CRASH_DUMP support on x86_64. It is impossible to read out the kernel contents from /proc/vmcore because saved_max_pfn is set to zero instead of the max_pfn value before the user map is setup. This happens because saved_max_pfn is initialized at parse_early_param() time, and at this time no active regions have been registered. save_max_pfn is setup from e820_end_of_ram(), more exact find_max_pfn_with_active_regions() which returns 0 because no regions exist. This patch fixes this by registering before and removing after the call to e820_end_of_ram(). Signed-off-by: Magnus Damm <magnus@valinux.co.jp> Signed-off-by: Andi Kleen <ak@suse.de>
-rw-r--r--arch/x86_64/kernel/e820.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/x86_64/kernel/e820.c b/arch/x86_64/kernel/e820.c
index 855b5611318f..6fe191c58084 100644
--- a/arch/x86_64/kernel/e820.c
+++ b/arch/x86_64/kernel/e820.c
@@ -594,7 +594,9 @@ static int __init parse_memmap_opt(char *p)
* size before original memory map is
* reset.
*/
+ e820_register_active_regions(0, 0, -1UL);
saved_max_pfn = e820_end_of_ram();
+ remove_all_active_ranges();
#endif
end_pfn_map = 0;
e820.nr_map = 0;