writeback: update writeback tracepoints to report cgroup
The following tracepoints are updated to report the cgroup used during
cgroup writeback.
* writeback_write_inode[_start]
* writeback_queue
* writeback_exec
* writeback_start
* writeback_written
* writeback_wait
* writeback_nowork
* writeback_wake_background
* wbc_writepage
* writeback_queue_io
* bdi_dirty_ratelimit
* balance_dirty_pages
* writeback_sb_inodes_requeue
* writeback_single_inode[_start]
Note that writeback_bdi_register is separated out from writeback_class
as reporting cgroup doesn't make sense to it. Tracepoints which take
bdi are updated to take bdi_writeback instead.
Signed-off-by: Tejun Heo <tj@kernel.org>
Suggested-by: Jan Kara <jack@suse.cz>
Reviewed-by: Jan Kara <jack@suse.cz>
Signed-off-by: Jens Axboe <axboe@fb.com>
diff --git a/mm/page-writeback.c b/mm/page-writeback.c
index 22cddd3..802beeb 100644
--- a/mm/page-writeback.c
+++ b/mm/page-writeback.c
@@ -1289,7 +1289,7 @@
wb->dirty_ratelimit = max(dirty_ratelimit, 1UL);
wb->balanced_dirty_ratelimit = balanced_dirty_ratelimit;
- trace_bdi_dirty_ratelimit(wb->bdi, dirty_rate, task_ratelimit);
+ trace_bdi_dirty_ratelimit(wb, dirty_rate, task_ratelimit);
}
static void __wb_update_bandwidth(struct dirty_throttle_control *gdtc,
@@ -1683,7 +1683,7 @@
* do a reset, as it may be a light dirtier.
*/
if (pause < min_pause) {
- trace_balance_dirty_pages(bdi,
+ trace_balance_dirty_pages(wb,
sdtc->thresh,
sdtc->bg_thresh,
sdtc->dirty,
@@ -1712,7 +1712,7 @@
}
pause:
- trace_balance_dirty_pages(bdi,
+ trace_balance_dirty_pages(wb,
sdtc->thresh,
sdtc->bg_thresh,
sdtc->dirty,