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writeback: trace event bdi_dirty_ratelimit

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It helps understand how various throttle bandwidths are updated.

Signed-off-by: Wu Fengguang <fengguang.wu@intel.com>
This commit is contained in:
Wu Fengguang
2011-03-02 17:22:49 -06:00
parent 50657fc4df
commit b48c104d22
2 changed files with 47 additions and 0 deletions
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mm/page-writeback.c
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@@ -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,