On Tue, Jul 23, 2013 at 9:21 PM, Lisa Du <cldu@xxxxxxxxxxx> wrote: > Dear Christoph > Thanks a lot for your comment. When this issue happen I just trigger a kernel panic and got the kdump. > From the kdump, I got the global variable pg_data_t congit_page_data. From this structure, I can see in normal zone, only order-0's nr_free = 18442, order-1's nr_free = 367, all the other order's nr_free is 0. Don't you use compaction? Of if use, please get a log by tracepoints. We need to know why it doesn't work. -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>