在 2021/4/19 18:56, Youling Tang 写道:
From: Huacai Chen <chenhc@xxxxxxxxxx>
kexec-tools use mem=X@Y to pass usable memories to crash kernel, but in
commit a94e4f24ec836c8984f83959 ("MIPS: init: Drop boot_mem_map") all
BIOS passed memories are removed by early_parse_mem(). I think this is
reasonable for a normal kernel but not for a crash kernel, because a
crash kernel should be able to see all old memories, even though it is
not supposed to use them.
Fixes: a94e4f24ec836c8984f83959 ("MIPS: init: Drop boot_mem_map")
Signed-off-by: Huacai Chen <chenhuacai@xxxxxxxxxx>
Signed-off-by: Youling Tang <tangyouling@xxxxxxxxxxx>
---
arch/mips/kernel/setup.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/arch/mips/kernel/setup.c b/arch/mips/kernel/setup.c
index b86e241..ac90d3b 100644
--- a/arch/mips/kernel/setup.c
+++ b/arch/mips/kernel/setup.c
@@ -351,8 +351,10 @@ static int __init early_parse_mem(char *p)
*/
if (usermem == 0) {
usermem = 1;
+#ifndef CONFIG_CRASH_DUMP
Why depend on a config instead of a runtime variable?
Btw as you are fixing my commit please keep me CCed.
Thanks.
- Jiaxun
