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| author | Lars Ellenberg <lars.ellenberg@linbit.com> | 2014-04-28 18:43:19 +0200 |
|---|---|---|
| committer | Jens Axboe <axboe@fb.com> | 2014-04-30 13:46:54 -0600 |
| commit | e82998743385ca861b9ec919eb2ba8177ce72180 (patch) | |
| tree | 4cf895d0a9633eff1f11363f98ebe60713a4bcd7 /drivers/block/drbd/drbd_state.c | |
| parent | 0e49d7b014c5d591a053d08888a455bd74a88646 (diff) | |
| download | linux-e82998743385ca861b9ec919eb2ba8177ce72180.tar.bz2 | |
drbd: don't let application IO pre-empt resync too often
Before, application IO could pre-empt resync activity
for up to hardcoded 20 seconds per resync request.
A very busy server could throttle the effective resync bandwidth
down to one request per 20 seconds.
Now, we only let application IO pre-empt resync traffic
while the current resync rate estimate is above c-min-rate.
If you disable the c-min-rate throttle feature (set c-min-rate = 0),
application IO will no longer pre-empt resync traffic at all.
Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
Diffstat (limited to 'drivers/block/drbd/drbd_state.c')
0 files changed, 0 insertions, 0 deletions