From: Cliff Wickman <cpw@xxxxxxx>
On kexec set-up of a crash kernel on a very large memory machine we
sometimes see the worrisome warning:
Too many memory ranges, truncating...
meaning that the total count of e820 ram, reserved and ACPI spaces is over 128.
Per the comment in do_bzImage_load():
/* If using bzImage for capture kernel, then we will not be
* executing real mode code. setup segment can be loaded
* anywhere as we will be just reading command line.
*/
So if I understand, the e820 table built here and added to the 'real_mode'
area is not going to be used.
So the warning message can be omitted.
Signed-off-by: Cliff Wickman <cpw at sgi.com>
---
kexec/arch/i386/x86-linux-setup.c | 9 ++++++++-
1 file changed, 8 insertions(+), 1 deletion(-)
Index: kexec-tools-2.0.4-rc1/kexec/arch/i386/x86-linux-setup.c
===================================================================
--- kexec-tools-2.0.4-rc1.orig/kexec/arch/i386/x86-linux-setup.c
+++ kexec-tools-2.0.4-rc1/kexec/arch/i386/x86-linux-setup.c
@@ -34,6 +34,7 @@
#include "../../kexec.h"
#include "kexec-x86.h"
#include "x86-linux-setup.h"
+#include "../../kexec/kexec-syscall.h"
void init_linux_parameters(struct x86_linux_param_header *real_mode)
{
@@ -491,7 +492,13 @@ void setup_linux_system_parameters(struc
die("Cannot get memory information\n");
}
if (ranges > E820MAX) {
- fprintf(stderr, "Too many memory ranges, truncating...\n");
+ if (!(kexec_flags & KEXEC_ON_CRASH))
+ /*
+ * this e820 not used for capture kernel, see
+ * do_bzImage_load()
+ */
+ fprintf(stderr,
+ "Too many memory ranges, truncating...\n");
ranges = E820MAX;
}
real_mode->e820_map_nr = ranges;
