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writeback: update writeback tracepoints to report cgroup

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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>
This commit is contained in:
Tejun Heo
2015-08-18 14:54:56 -07:00
committed by Jens Axboe
parent 9acee9c551
commit 5634cc2aa9
3 changed files with 152 additions and 50 deletions
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14
fs/fs-writeback.c
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@@ -176,7 +176,7 @@ static void wb_wakeup(struct bdi_writeback *wb)
static void wb_queue_work(struct bdi_writeback *wb,
struct wb_writeback_work *work)
{
trace_writeback_queue(wb->bdi, work);
trace_writeback_queue(wb, work);
spin_lock_bh(&wb->work_lock);
if (!test_bit(WB_registered, &wb->state))
@@ -883,7 +883,7 @@ void wb_start_writeback(struct bdi_writeback *wb, long nr_pages,
*/
work = kzalloc(sizeof(*work), GFP_ATOMIC);
if (!work) {
trace_writeback_nowork(wb->bdi);
trace_writeback_nowork(wb);
wb_wakeup(wb);
return;
}
@@ -913,7 +913,7 @@ void wb_start_background_writeback(struct bdi_writeback *wb)
* We just wake up the flusher thread. It will perform background
* writeback as soon as there is no other work to do.
*/
trace_writeback_wake_background(wb->bdi);
trace_writeback_wake_background(wb);
wb_wakeup(wb);
}
@@ -1616,14 +1616,14 @@ static long wb_writeback(struct bdi_writeback *wb,
} else if (work->for_background)
oldest_jif = jiffies;
trace_writeback_start(wb->bdi, work);
trace_writeback_start(wb, work);
if (list_empty(&wb->b_io))
queue_io(wb, work);
if (work->sb)
progress = writeback_sb_inodes(work->sb, wb, work);
else
progress = __writeback_inodes_wb(wb, work);
trace_writeback_written(wb->bdi, work);
trace_writeback_written(wb, work);
wb_update_bandwidth(wb, wb_start);
@@ -1648,7 +1648,7 @@ static long wb_writeback(struct bdi_writeback *wb,
* we'll just busyloop.
*/
if (!list_empty(&wb->b_more_io)) {
trace_writeback_wait(wb->bdi, work);
trace_writeback_wait(wb, work);
inode = wb_inode(wb->b_more_io.prev);
spin_lock(&inode->i_lock);
spin_unlock(&wb->list_lock);
@@ -1754,7 +1754,7 @@ static long wb_do_writeback(struct bdi_writeback *wb)
while ((work = get_next_work_item(wb)) != NULL) {
struct wb_completion *done = work->done;
trace_writeback_exec(wb->bdi, work);
trace_writeback_exec(wb, work);
wrote += wb_writeback(wb, work);