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Re: [PATCH 00/14] introduce the BFQ-v0 I/O scheduler as an extra scheduler

From Heinz Diehl <htd+ml@fritha.org>
Newsgroups linux.kernel
Subject Re: [PATCH 00/14] introduce the BFQ-v0 I/O scheduler as an extra scheduler
Date 2016-10-27 18:00 +0200
Message-ID <swVfY-3Pm-17@gated-at.bofh.it> (permalink)
References (5 earlier) <swyt4-5IE-23@gated-at.bofh.it> <swyW6-6ba-45@gated-at.bofh.it> <swz5Q-6fE-11@gated-at.bofh.it> <swTxw-2VB-41@gated-at.bofh.it> <swU0z-38X-67@gated-at.bofh.it>
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On 27.10.2016, Grozdan wrote: 

> So in the end, I'm here to support the inclusion of BFQ. Paolo has put
> too much energy, time, and sleepless nights into this so people like
> me can have a working, responsive system during heavy disk operations.
> From a normal user's perspective, I do not want BFQ to be dismissed
> and all the effort/time/etc thrown out the window. From my
> perspective, Paolo deserves more support from the guys in charge of
> the block layer in Linux.

I really  want to second that!

Just take a bog-standard desktop PC with an SSD and a reasonably fast
CPU (an 8-core Xeon in my case) and do the following:

1. dd if=/dev/zero of=deleteme bs=1M count=50000
2. Start oowriter (Libreoffice Writer)

Using both cfq, deadline or noop, oowriter does not load until dd'ing
the 50 gigs is finished. Using bfq, oowriter loads nearly immediately.

Not to mention that both cfq, deadline and noop are a nightmare on
Android in terms of latency.

I'm (obviously) neither a kernel nor a bfq developer, but I really
want you to reconsider, with the overall greatness of bfq in mind, if
it really is totally impossible to include it at least as a scheduler
option, alongside the other three already existing ones.

Thanks,
 Heinz

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Thread

[PATCH 00/14] introduce the BFQ-v0 I/O scheduler as an extra scheduler Paolo Valente <paolo.valente@linaro.org> - 2016-10-26 11:30 +0200
  [PATCH 05/14] block, bfq: add more fairness with writes and slow processes Paolo Valente <paolo.valente@linaro.org> - 2016-10-26 11:30 +0200
  [PATCH 04/14] block, bfq: modify the peak-rate estimator Paolo Valente <paolo.valente@linaro.org> - 2016-10-26 11:40 +0200
  [PATCH 03/14] block, bfq: improve throughput boosting Paolo Valente <paolo.valente@linaro.org> - 2016-10-26 11:40 +0200
  [PATCH 09/14] block, bfq: reduce latency during request-pool saturation Paolo Valente <paolo.valente@linaro.org> - 2016-10-26 11:40 +0200
  [PATCH 07/14] block, bfq: reduce I/O latency for soft real-time applications Paolo Valente <paolo.valente@linaro.org> - 2016-10-26 11:40 +0200
  Re: [PATCH 00/14] introduce the BFQ-v0 I/O scheduler as an extra  scheduler Christoph Hellwig <hch@infradead.org> - 2016-10-26 12:30 +0200
    Re: [PATCH 00/14] introduce the BFQ-v0 I/O scheduler as an extra  scheduler Jan Kara <jack@suse.cz> - 2016-10-26 13:40 +0200
      Re: [PATCH 00/14] introduce the BFQ-v0 I/O scheduler as an extra scheduler Arnd Bergmann <arnd@arndb.de> - 2016-10-26 17:20 +0200
        Re: [PATCH 00/14] introduce the BFQ-v0 I/O scheduler as an extra  scheduler Christoph Hellwig <hch@infradead.org> - 2016-10-26 17:40 +0200
          Re: [PATCH 00/14] introduce the BFQ-v0 I/O scheduler as an extra  scheduler Jens Axboe <axboe@kernel.dk> - 2016-10-26 17:40 +0200
            Re: [PATCH 00/14] introduce the BFQ-v0 I/O scheduler as an extra scheduler Paolo Valente <paolo.valente@linaro.org> - 2016-10-26 18:10 +0200
              Re: [PATCH 00/14] introduce the BFQ-v0 I/O scheduler as an extra  scheduler Jens Axboe <axboe@kernel.dk> - 2016-10-26 18:20 +0200
                Re: [PATCH 00/14] introduce the BFQ-v0 I/O scheduler as an extra  scheduler Jan Kara <jack@suse.cz> - 2016-10-27 16:10 +0200
                Re: [PATCH 00/14] introduce the BFQ-v0 I/O scheduler as an extra scheduler Grozdan <neutrino8@gmail.com> - 2016-10-27 16:40 +0200
                Re: [PATCH 00/14] introduce the BFQ-v0 I/O scheduler as an extra  scheduler Heinz Diehl <htd+ml@fritha.org> - 2016-10-27 18:00 +0200
                Re: [PATCH 00/14] introduce the BFQ-v0 I/O scheduler as an extra  scheduler Jens Axboe <axboe@kernel.dk> - 2016-10-27 18:30 +0200
                Re: [PATCH 00/14] introduce the BFQ-v0 I/O scheduler as an extra  scheduler Jens Axboe <axboe@kernel.dk> - 2016-10-27 18:30 +0200
                Re: [PATCH 00/14] introduce the BFQ-v0 I/O scheduler as an extra  scheduler Jan Kara <jack@suse.cz> - 2016-10-28 10:00 +0200
                Re: [PATCH 00/14] introduce the BFQ-v0 I/O scheduler as an extra  scheduler Jens Axboe <axboe@kernel.dk> - 2016-10-28 16:20 +0200
                Re: [PATCH 00/14] introduce the BFQ-v0 I/O scheduler as an extra scheduler Ulf Hansson <ulf.hansson@linaro.org> - 2016-10-27 19:40 +0200
                Re: [PATCH 00/14] introduce the BFQ-v0 I/O scheduler as an extra  scheduler Jens Axboe <axboe@kernel.dk> - 2016-10-27 19:50 +0200
                Re: [PATCH 00/14] introduce the BFQ-v0 I/O scheduler as an extra scheduler Ulf Hansson <ulf.hansson@linaro.org> - 2016-10-27 20:20 +0200
                Re: [PATCH 00/14] introduce the BFQ-v0 I/O scheduler as an extra  scheduler Jens Axboe <axboe@kernel.dk> - 2016-10-27 20:30 +0200
                Re: [PATCH 00/14] introduce the BFQ-v0 I/O scheduler as an extra scheduler Ulf Hansson <ulf.hansson@linaro.org> - 2016-10-27 21:40 +0200
                Re: [PATCH 00/14] introduce the BFQ-v0 I/O scheduler as an extra  scheduler Jens Axboe <axboe@kernel.dk> - 2016-10-27 23:10 +0200
                Re: [PATCH 00/14] introduce the BFQ-v0 I/O scheduler as an extra scheduler Linus Walleij <linus.walleij@linaro.org> - 2016-10-28 00:30 +0200
                Re: [PATCH 00/14] introduce the BFQ-v0 I/O scheduler as an extra scheduler Linus Walleij <linus.walleij@linaro.org> - 2016-10-28 11:40 +0200
                Re: [PATCH 00/14] introduce the BFQ-v0 I/O scheduler as an extra  scheduler Jens Axboe <axboe@kernel.dk> - 2016-10-28 16:30 +0200
                Re: [PATCH 00/14] introduce the BFQ-v0 I/O scheduler as an extra scheduler Linus Walleij <linus.walleij@linaro.org> - 2016-10-28 22:40 +0200
                Re: [PATCH 00/14] introduce the BFQ-v0 I/O scheduler as an extra  scheduler Christoph Hellwig <hch@infradead.org> - 2016-10-28 17:30 +0200
                Re: [PATCH 00/14] introduce the BFQ-v0 I/O scheduler as an extra scheduler Linus Walleij <linus.walleij@linaro.org> - 2016-10-28 23:10 +0200
                Re: [PATCH 00/14] introduce the BFQ-v0 I/O scheduler as an extra  scheduler Jens Axboe <axboe@kernel.dk> - 2016-10-28 17:40 +0200
                Re: [PATCH 00/14] introduce the BFQ-v0 I/O scheduler as an extra  scheduler Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com> - 2016-10-28 18:00 +0200
                Re: [PATCH 00/14] introduce the BFQ-v0 I/O scheduler as an extra scheduler Arnd Bergmann <arnd@arndb.de> - 2016-10-28 18:10 +0200
                Re: [PATCH 00/14] introduce the BFQ-v0 I/O scheduler as an extra  scheduler Mark Brown <broonie@kernel.org> - 2016-10-28 19:20 +0200
                Re: [PATCH 00/14] introduce the BFQ-v0 I/O scheduler as an extra  scheduler Jens Axboe <axboe@kernel.dk> - 2016-10-28 16:10 +0200
                Re: [PATCH 00/14] introduce the BFQ-v0 I/O scheduler as an extra scheduler Ulf Hansson <ulf.hansson@linaro.org> - 2016-10-28 08:40 +0200
                Re: [PATCH 00/14] introduce the BFQ-v0 I/O scheduler as an extra  scheduler Jens Axboe <axboe@kernel.dk> - 2016-10-28 16:20 +0200
                Re: [PATCH 00/14] introduce the BFQ-v0 I/O scheduler as an extra  scheduler Mark Brown <broonie@kernel.org> - 2016-10-28 19:20 +0200
                Re: [PATCH 00/14] introduce the BFQ-v0 I/O scheduler as an extra  scheduler Christoph Hellwig <hch@infradead.org> - 2016-10-27 21:50 +0200
                Re: [PATCH 00/14] introduce the BFQ-v0 I/O scheduler as an extra  scheduler Mark Brown <broonie@kernel.org> - 2016-10-28 00:10 +0200
                Re: [PATCH 00/14] introduce the BFQ-v0 I/O scheduler as an extra  scheduler Mark Brown <broonie@kernel.org> - 2016-10-27 21:50 +0200
                Re: [PATCH 00/14] introduce the BFQ-v0 I/O scheduler as an extra scheduler Arnd Bergmann <arnd@arndb.de> - 2016-10-28 14:10 +0200
                Re: [PATCH 00/14] introduce the BFQ-v0 I/O scheduler as an extra scheduler Richard Weinberger <richard.weinberger@gmail.com> - 2016-10-28 14:20 +0200
                Re: [PATCH 00/14] introduce the BFQ-v0 I/O scheduler as an extra scheduler Paolo Valente <paolo.valente@linaro.org> - 2016-10-29 07:40 +0200
                Re: [PATCH 00/14] introduce the BFQ-v0 I/O scheduler as an extra  scheduler Bart Van Assche <Bart.VanAssche@sandisk.com> - 2016-10-29 15:20 +0200
                Re: [PATCH 00/14] introduce the BFQ-v0 I/O scheduler as an extra  scheduler Jens Axboe <axboe@kernel.dk> - 2016-10-29 16:20 +0200
                Re: [PATCH 00/14] introduce the BFQ-v0 I/O scheduler as an extra scheduler Paolo Valente <paolo.valente@linaro.org> - 2016-10-30 04:10 +0100
    Re: [PATCH 00/14] introduce the BFQ-v0 I/O scheduler as an extra scheduler Paolo Valente <paolo.valente@linaro.org> - 2016-10-26 14:50 +0200

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