tree 60088e9b8c13acbc492b880ffddc310593f5ed8f
parent e743eb1ecd5564b5ae0a4a76c1566f748a358839
author Paolo Valente <paolo.valente@linaro.org> 1501824910 +0200
committer Jens Axboe <axboe@kernel.dk> 1502463482 -0600

block,bfq: refactor device-idling logic

The logic that decides whether to idle the device is scattered across
three functions. Almost all of the logic is in the function
bfq_bfqq_may_idle, but (1) part of the decision is made in
bfq_update_idle_window, and (2) the function bfq_bfqq_must_idle may
switch off idling regardless of the output of bfq_bfqq_may_idle. In
addition, both bfq_update_idle_window and bfq_bfqq_must_idle make
their decisions as a function of parameters that are used, for similar
purposes, also in bfq_bfqq_may_idle. This commit addresses these
issues by moving all the logic into bfq_bfqq_may_idle.

Signed-off-by: Paolo Valente <paolo.valente@linaro.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>