block, bfq: fix switch back from soft-rt weitgh-raising

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A bfq_queue may happen to be deemed as soft real-time while it is
still enjoying interactive weight-raising. If this happens because of
a false positive, then the bfq_queue is likely to loose its soft
real-time status soon. Upon losing such a status, the bfq_queue must
get back its interactive weight-raising, if its interactive period is
not over yet. But this case is not handled. This commit corrects this
error.

Tested-by: Jan Kara <jack@suse.cz>
Signed-off-by: Paolo Valente <paolo.valente@linaro.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

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Paolo Valente 2021-01-25 20:02:45 +01:00 • committed by Jens Axboe

parent 7f1995c27b

commit d1f600fa47

1 changed files with 20 additions and 2 deletions

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block/bfq-iosched.c

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