block, bfq: fix service being wrongly set to zero in case of preemption
If - a bfq_queue Q preempts another queue, because one request of Q arrives in time, - but, after this preemption, Q is not the queue that is set in service, then Q->entity.service is set to 0 when Q is eventually set in service. But Q should have continued receiving service with its old budget (which is why preemption has occurred) and its old service. This commit addresses this issue by resetting service on queue real expiration. Tested-by: NHolger Hoffstätte <holger@applied-asynchrony.com> Tested-by: NOleksandr Natalenko <oleksandr@natalenko.name> Signed-off-by: NPaolo Valente <paolo.valente@linaro.org> Signed-off-by: NJens Axboe <axboe@kernel.dk>
Showing
想要评论请 注册 或 登录