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[146.241.101.27]) by smtp.gmail.com with ESMTPSA id q25sm17615395wrc.68.2019.06.24.12.41.04 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Mon, 24 Jun 2019 12:41:04 -0700 (PDT) From: Paolo Valente To: Jens Axboe Cc: linux-block@vger.kernel.org, linux-kernel@vger.kernel.org, ulf.hansson@linaro.org, linus.walleij@linaro.org, bfq-iosched@googlegroups.com, oleksandr@natalenko.name, bottura.nicola95@gmail.com, srivatsa@csail.mit.edu, Paolo Valente Subject: [PATCH BUGFIX IMPROVEMENT 0/7] boost throughput with synced I/O, reduce latency and fix a bandwidth bug Date: Mon, 24 Jun 2019 21:40:35 +0200 Message-Id: <20190624194042.38747-1-paolo.valente@linaro.org> X-Mailer: git-send-email 2.20.1 MIME-Version: 1.0 Sender: linux-block-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-block@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Hi Jens, this series, based against for-5.3/block, contains: 1) The improvements to recover the throughput loss reported by Srivatsa [1] (first five patches) 2) A preemption improvement to reduce I/O latency 3) A fix of a subtle bug causing loss of control over I/O bandwidths Thanks, Paolo [1] https://lkml.org/lkml/2019/5/17/755 Paolo Valente (7): block, bfq: reset inject limit when think-time state changes block, bfq: fix rq_in_driver check in bfq_update_inject_limit block, bfq: update base request service times when possible block, bfq: bring forward seek&think time update block, bfq: detect wakers and unconditionally inject their I/O block, bfq: preempt lower-weight or lower-priority queues block, bfq: re-schedule empty queues if they deserve I/O plugging block/bfq-iosched.c | 952 ++++++++++++++++++++++++++++++-------------- block/bfq-iosched.h | 25 +- 2 files changed, 686 insertions(+), 291 deletions(-) Reported-by: Srivatsa S. Bhat (VMware) Tested-by: Srivatsa S. Bhat (VMware) --- 2.20.1