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| author | Magnus Damm <magnus@valinux.co.jp> | 2006-11-14 16:57:46 +0100 |
|---|---|---|
| committer | Andi Kleen <andi@basil.nowhere.org> | 2006-11-14 16:57:46 +0100 |
| commit | 15803a43288da434d34d41c4ed650c3c1728d42c (patch) | |
| tree | 6294e8d6a95e329c6cae85ff07f0e2459e76971d | |
| parent | 5e58a02a8f6a7a1c9ae41f39286bcd3aea0d6f24 (diff) | |
| download | linux-stable-15803a43288da434d34d41c4ed650c3c1728d42c.tar.gz linux-stable-15803a43288da434d34d41c4ed650c3c1728d42c.tar.bz2 linux-stable-15803a43288da434d34d41c4ed650c3c1728d42c.zip | |
[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.c | 2 |
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; |