blk-iocost: Add iocg idle state tracepoint
It will be helpful to trace the iocg's whole state, including active and
idle state. And we can easily expand the original iocost_iocg_activate
trace event to support a state trace class, including active and idle
state tracing.
Acked-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Baolin Wang <baolin.wang@linux.alibaba.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
diff --git a/block/blk-iocost.c b/block/blk-iocost.c
index ffa418c..ac6078a 100644
--- a/block/blk-iocost.c
+++ b/block/blk-iocost.c
@@ -2185,6 +2185,9 @@ static int ioc_check_iocgs(struct ioc *ioc, struct ioc_now *now)
WEIGHT_ONE);
}
+ TRACE_IOCG_PATH(iocg_idle, iocg, now,
+ atomic64_read(&iocg->active_period),
+ atomic64_read(&ioc->cur_period), vtime);
__propagate_weights(iocg, 0, 0, false, now);
list_del_init(&iocg->active_list);
}
