From b48c104d2211b0ac881a71f5f76a3816225f8111 Mon Sep 17 00:00:00 2001 From: Wu Fengguang Date: Wed, 2 Mar 2011 17:22:49 -0600 Subject: writeback: trace event bdi_dirty_ratelimit It helps understand how various throttle bandwidths are updated. Signed-off-by: Wu Fengguang --- mm/page-writeback.c | 2 ++ 1 file changed, 2 insertions(+) (limited to 'mm/page-writeback.c') diff --git a/mm/page-writeback.c b/mm/page-writeback.c index 0802d5177997..e3c2d8bf87bb 100644 --- a/mm/page-writeback.c +++ b/mm/page-writeback.c @@ -875,6 +875,8 @@ static void bdi_update_dirty_ratelimit(struct backing_dev_info *bdi, bdi->dirty_ratelimit = max(dirty_ratelimit, 1UL); bdi->balanced_dirty_ratelimit = balanced_dirty_ratelimit; + + trace_bdi_dirty_ratelimit(bdi, dirty_rate, task_ratelimit); } void __bdi_update_bandwidth(struct backing_dev_info *bdi, -- cgit v1.2.3