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-rw-r--r--arch/x86/kernel/setup.c4
1 files changed, 3 insertions, 1 deletions
diff --git a/arch/x86/kernel/setup.c b/arch/x86/kernel/setup.c
index 4cfba947d774..eb69b14dbfc8 100644
--- a/arch/x86/kernel/setup.c
+++ b/arch/x86/kernel/setup.c
@@ -575,7 +575,9 @@ static void __init reserve_crashkernel(void)
/* 0 means: find the address automatically */
if (crash_base <= 0) {
/*
- * kexec want bzImage is below CRASH_KERNEL_ADDR_MAX
+ * Set CRASH_ADDR_LOW_MAX upper bound for crash memory,
+ * as old kexec-tools loads bzImage below that, unless
+ * "crashkernel=size[KMG],high" is specified.
*/
crash_base = memblock_find_in_range(CRASH_ALIGN,
high ? CRASH_ADDR_HIGH_MAX