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| author | Lars Ellenberg <lars.ellenberg@linbit.com> | 2013-12-20 14:22:13 +0400 |
|---|---|---|
| committer | Philipp Reisner <philipp.reisner@linbit.com> | 2014-07-10 20:35:13 +0400 |
| commit | ad3fee790088d36ad862e31535b5b99c25adeef4 (patch) | |
| tree | 916a5c23cf57283f9f6a5abf8418364c52249ad9 /tools/perf/scripts/python/export-to-postgresql.py | |
| parent | 7753a4c17f9e305ed19d8851e1a3154c8c9abaaf (diff) | |
| download | linux-ad3fee790088d36ad862e31535b5b99c25adeef4.tar.xz | |
drbd: improve throttling decisions of background resynchronisation
Background resynchronisation does some "side-stepping", or throttles
itself, if it detects application IO activity, and the current resync
rate estimate is above the configured "cmin-rate".
What was not detected: if there is no application IO,
because it blocks on activity log transactions.
Introduce a new atomic_t ap_actlog_cnt, tracking such blocked requests,
and count non-zero as application IO activity.
This counter is exposed at proc_details level 2 and above.
Also make sure to release the currently locked resync extent
if we side-step due to such voluntary throttling.
Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
Diffstat (limited to 'tools/perf/scripts/python/export-to-postgresql.py')
0 files changed, 0 insertions, 0 deletions