tree 52387142d1f1dee29676e7233aafc6c531fff768
parent 76a8040817b4b9c69b53f9b326987fa891b4082a
author Paolo Valente <paolo.valente@linaro.org> 1624111782 +0200
committer Jens Axboe <axboe@kernel.dk> 1624309421 -0600

block, bfq: let also stably merged queues enjoy weight raising

Merged bfq_queues are kept out of weight-raising (low-latency)
mechanisms. The reason is that these queues are usually created for
non-interactive and non-soft-real-time tasks. Yet this is not the case
for stably-merged queues. These queues are merged just because they
are created shortly after each other. So they may easily serve the I/O
of an interactive or soft-real time application, if the application
happens to spawn multiple processes.

To address this issue, this commits lets also stably-merged queued
enjoy weight raising.

Signed-off-by: Paolo Valente <paolo.valente@linaro.org>
Link: https://lore.kernel.org/r/20210619140948.98712-2-paolo.valente@linaro.org
Signed-off-by: Jens Axboe <axboe@kernel.dk>