Dump kernel work in limited memory space and makedumpfile buffers
have to fit to empty memory due to not be killed with OOM-killer.
v2: avoid divide by zero
Signed-off-by: Maxim Uvarov <maxim.uvarov at oracle.com>
---
makedumpfile.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/makedumpfile.c b/makedumpfile.c
index b42565c..14bacb2 100644
--- a/makedumpfile.c
+++ b/makedumpfile.c
@@ -2997,6 +2997,8 @@ out:
* Truncate the buffer size to free memory size.
*/
free_memory = get_free_memory_size();
+ if (info->num_dumpfile > 1)
+ free_memory /= info->num_dumpfile;
if (info->bufsize_cyclic > free_memory) {
MSG("Specified buffer size is larger than free memory.\n");
MSG("The buffer size for the cyclic mode will ");
@@ -8548,6 +8550,9 @@ calculate_cyclic_buffer_size(void) {
*/
free_size = get_free_memory_size() * 0.4;
needed_size = (info->max_mapnr * 2) / BITPERBYTE;
+ /* if --split was specified cyclic buffer allocated per dump file */
+ if (info->num_dumpfile > 1)
+ needed_size /= info->num_dumpfile;
info->bufsize_cyclic = (free_size <= needed_size) ? free_size : needed_size;
--
1.7.9.5
