In case elf dump, the code to calculate the cyclic buffer size is
not correct. Since elf need bitmap1/2, so the needed memory for
bufsize_cyclic need be double. Hence free size should be 40% of
free memory, however the needed_size which free_size is compared
with should be info->max_mapnr / BITPERBYTE, but not 2 times of it.
Because of this, in case of free memory in 2nd kernel is not too much,
OOM will happen very often.
Signed-off-by: Baoquan He <bhe at redhat.com>
---
makedumpfile.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/makedumpfile.c b/makedumpfile.c
index 75092a8..01ec516 100644
--- a/makedumpfile.c
+++ b/makedumpfile.c
@@ -9010,7 +9010,7 @@ calculate_cyclic_buffer_size(void) {
*/
if (info->flag_elf_dumpfile) {
free_size = get_free_memory_size() * 0.4;
- needed_size = (info->max_mapnr * 2) / BITPERBYTE;
+ needed_size = info->max_mapnr / BITPERBYTE;
} else {
free_size = get_free_memory_size() * 0.8;
needed_size = info->max_mapnr / BITPERBYTE;
--
1.8.5.3
