Hello Dave,
I found the option -r fails when it comes to blkio subsystem
on kernel after 3.5. This patch can fix the bug.
Thanks,
Zhang Xiaohe
--- ../crash/extensions/cgget.c 2013-03-12 16:38:05.709837000 +0800
+++ extensions/cgget.c 2013-03-12 16:16:18.130217000 +0800
@@ -3755,28 +3755,25 @@
}
/* there should be nothing to be displayed for reset_stats */
fprintf(fp, "%s.reset_stats: \n", group_list->subsys_str);
- return;
- }
-
- if (blkio_offset_table.blkg_stats == -1)
+ } else if (STRUCT_EXISTS("blkio_cgroup")) {
+ for (plid = 0; plid <= BLKIO_POLICY_THROTL; plid++) {
+ if (plid == BLKIO_POLICY_PROP)
+ for (atid = 1; atid <= BLKIO_PROP_io_queued; atid++) {
+ blkio_read_map(subsys_addr, plid, atid,
+ group_list->subsys_str);
+ }
+ else
+ for (atid = BLKIO_THROTL_read_bps_device;
+ atid <= BLKIO_THROTL_io_serviced; atid++) {
+ blkio_read_map(subsys_addr, plid, atid,
+ group_list->subsys_str);
+ }
+ }
+ /* there should be nothing to be displayed for reset_stats */
+ fprintf(fp, "%s.reset_stats: \n", group_list->subsys_str);
+ } else if (blkio_offset_table.blkg_stats == -1)
/* for kernel version 2.6.33, 2.6.34 */
- return blkio_print_param_old(subsys_addr);
-
- for (plid = 0; plid <= BLKIO_POLICY_THROTL; plid++) {
- if (plid == BLKIO_POLICY_PROP)
- for (atid = 1; atid <= BLKIO_PROP_io_queued; atid++) {
- blkio_read_map(subsys_addr, plid, atid,
- group_list->subsys_str);
- }
- else
- for (atid = BLKIO_THROTL_read_bps_device;
- atid <= BLKIO_THROTL_io_serviced; atid++) {
- blkio_read_map(subsys_addr, plid, atid,
- group_list->subsys_str);
- }
- }
- /* there should be nothing to be displayed for reset_stats */
- fprintf(fp, "%s.reset_stats: \n", group_list->subsys_str);
+ blkio_print_param_old(subsys_addr);
/* second, output the needed param */
if (test_bit(blkio_subsys_id, variable_flag)) {
--
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