linux-kernel - [PATCH BUGFIX/IMPROVEMENT 0/6] block, bfq: first bath of fixes and improvements

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Message-Id: <20210122181948.35660-1-paolo.valente@linaro.org>
Date:   Fri, 22 Jan 2021 19:19:42 +0100
From:   Paolo Valente <paolo.valente@...aro.org>
To:     Jens Axboe <axboe@...nel.dk>
Cc:     linux-block@...r.kernel.org, linux-kernel@...r.kernel.org,
        Paolo Valente <paolo.valente@...aro.org>
Subject: [PATCH BUGFIX/IMPROVEMENT 0/6] block, bfq: first bath of fixes and improvements

Hi,

about nine months ago, Jan (Kara, SUSE) reported a throughput
regression with BFQ. That was the beginning of a fruitful dev&testing
collaboration, which led to 18 new commits. Part are fixes, part are
actual performance improvements.

Jia Cheng Hu (1):
  block, bfq: set next_rq to waker_bfqq->next_rq in waker injection

Paolo Valente (5):
  block, bfq: use half slice_idle as a threshold to check short ttime
  block, bfq: increase time window for waker detection
  block, bfq: do not raise non-default weights
  block, bfq: avoid spurious switches to soft_rt of interactive queues
  block, bfq: do not expire a queue when it is the only busy one

 block/bfq-iosched.c | 100 +++++++++++++++++++++++++++++++-------------
 1 file changed, 70 insertions(+), 30 deletions(-)

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2.20.1