The kernel gets the length of mem_section use this
from: include/linux/mmzone.h:1134
"#define NR_SECTION_ROOTS DIV_ROUND_UP(NR_MEM_SECTIONS,
SECTIONS_PER_ROOT)"
But when we check the memory model. We forget the
"DIV_ROUND_UP" method.
So when 32-bit ARM linux is in sparsemem_extreme memory:
with SECTION_SIZE_BIT=28 and 16 byte-size mem_section.
The makedumpfile can not identify the memory correctly.
This patch introduce the "DIV_ROUND_UP" method in this check.
Signed-off-by: Liu Hua <sdu.liu at huawei.com>
---
makedumpfile.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/makedumpfile.c b/makedumpfile.c
index 0b31932..16081a5 100644
--- a/makedumpfile.c
+++ b/makedumpfile.c
@@ -1599,7 +1599,7 @@ int
is_sparsemem_extreme(void)
{
if (ARRAY_LENGTH(mem_section)
- == (NR_MEM_SECTIONS() / _SECTIONS_PER_ROOT_EXTREME()))
+ == divideup(NR_MEM_SECTIONS(), _SECTIONS_PER_ROOT_EXTREME()))
return TRUE;
else
return FALSE;
--
1.9.0
