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| author | Damien Le Moal <[email protected]> | 2018-09-27 01:55:13 +0000 |
|---|---|---|
| committer | Jens Axboe <[email protected]> | 2018-09-27 01:57:24 +0000 |
| commit | 854f31ccdd7964c9c2e68da234a3a8aedb51cf6b (patch) | |
| tree | bd335dac4d4722bbe1c09cb76290b50da254fd8b /tools/testing/radix-tree/test.c | |
| parent | blk-mq: Allow blocking queue tag iter callbacks (diff) | |
| download | kernel-854f31ccdd7964c9c2e68da234a3a8aedb51cf6b.tar.gz kernel-854f31ccdd7964c9c2e68da234a3a8aedb51cf6b.zip | |
block: fix deadline elevator drain for zoned block devices
When the deadline scheduler is used with a zoned block device, writes
to a zone will be dispatched one at a time. This causes the warning
message:
deadline: forced dispatching is broken (nr_sorted=X), please report this
to be displayed when switching to another elevator with the legacy I/O
path while write requests to a zone are being retained in the scheduler
queue.
Prevent this message from being displayed when executing
elv_drain_elevator() for a zoned block device. __blk_drain_queue() will
loop until all writes are dispatched and completed, resulting in the
desired elevator queue drain without extensive modifications to the
deadline code itself to handle forced-dispatch calls.
Signed-off-by: Damien Le Moal <[email protected]>
Fixes: 8dc8146f9c92 ("deadline-iosched: Introduce zone locking support")
Cc: [email protected]
Signed-off-by: Jens Axboe <[email protected]>
Diffstat (limited to 'tools/testing/radix-tree/test.c')
0 files changed, 0 insertions, 0 deletions