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| author |   Lars Ellenberg <lars.ellenberg@linbit.com> | 2013-03-19 18:16:49 +0100 |
|---|---|---|
| committer |   Jens Axboe <axboe@kernel.dk> | 2013-03-22 18:14:00 -0600 |
| commit | ebfd5d8f715167b886c9401e6b123847187f137b (patch) | |
| tree | 33da96fa4f1949af33492299930491f2ee797c9a /tools/perf/scripts/python/export-to-postgresql.py | |
| parent | drbd: Clarify when activity log I/O is delegated to the worker thread (diff) | |
| download | linux-dev-ebfd5d8f715167b886c9401e6b123847187f137b.tar.xz linux-dev-ebfd5d8f715167b886c9401e6b123847187f137b.zip | |
drbd: drbd_al_being_io: short circuit to reduce latency
A request hitting an already "hot" extent should proceed right away,
even if some other requests need to wait for pending transactions.
Without that short-circuit, several simultaneous make_request contexts
race for committing the transaction, possibly penalizing the innocent.
Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'tools/perf/scripts/python/export-to-postgresql.py')
0 files changed, 0 insertions, 0 deletions