From: Zhang Yanfei <[email protected]>
One comment in reserve_crashkernel is out of date and incorrect.
So fix it.
Signed-off-by: Zhang Yanfei <[email protected]>
---
arch/x86/kernel/setup.c | 7 ++++++-
1 files changed, 6 insertions(+), 1 deletions(-)
diff --git a/arch/x86/kernel/setup.c b/arch/x86/kernel/setup.c
index 56f7fcf..eba0d78 100644
--- a/arch/x86/kernel/setup.c
+++ b/arch/x86/kernel/setup.c
@@ -590,7 +590,12 @@ 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
+ * For x86_64, when crashkernel=X,high is not passed, kexec
+ * wants bzImage is below CRASH_KERNEL_ADDR_LOW_MAX.
+ * For x86_32, crashkernel=X,high is not supported by defining
+ * CRASH_KERNEL_ADDR_HIGH_MAX and CRASH_KERNEL_ADDR_LOW_MAX
+ * with the same limit and kexec always wants bzImage is below
+ * this limit due to mapping restrictions.
*/
crash_base = memblock_find_in_range(alignment,
high ? CRASH_KERNEL_ADDR_HIGH_MAX :
--
1.7.1