| Message ID | 1600942079-18652-1-git-send-email-chenhc@lemote.com (mailing list archive) |
|---|---|
| State | Superseded |
| Headers | show |
| Series | [V2,1/3] MIPS: Crash kernel should be able to see old memories | expand |
diff --git a/arch/mips/kernel/setup.c b/arch/mips/kernel/setup.c index 4c04a86..e2804a2 100644 --- a/arch/mips/kernel/setup.c +++ b/arch/mips/kernel/setup.c @@ -392,8 +392,10 @@ static int __init early_parse_mem(char *p) */ if (usermem == 0) { usermem = 1; +#ifndef CONFIG_CRASH_DUMP memblock_remove(memblock_start_of_DRAM(), memblock_end_of_DRAM() - memblock_start_of_DRAM()); +#endif } start = 0; size = memparse(p, &p);
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 <chenhc@lemote.com> --- arch/mips/kernel/setup.c | 2 ++ 1 file changed, 2 insertions(+)