Re: [PATCH V3 00/11] block-throttle: add .high limit

From	Tejun Heo <tj@kernel.org>
Newsgroups	linux.kernel
Subject	Re: [PATCH V3 00/11] block-throttle: add .high limit
Date	2016-10-04 21:00 +0200
Message-ID	<soD6x-6vd-13@gated-at.bofh.it> (permalink)
References	(3 earlier) <soALn-5bt-15@gated-at.bofh.it> <soALn-5bt-13@gated-at.bofh.it> <soBo6-5Ek-9@gated-at.bofh.it> <soC0N-5S0-7@gated-at.bofh.it> <soC0N-5S0-5@gated-at.bofh.it>
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Hello, Paolo.

On Tue, Oct 04, 2016 at 07:43:48PM +0200, Paolo Valente wrote:
> > I don't think IO bandwidth does not matter. The problem is bandwidth can't
> > measure IO cost. For example, you can't say 8k IO costs 2x IO resource than 4k
> > IO.
> 
> For what goal do you need to be able to say this, once you succeeded
> in guaranteeing bandwidth and low latency to each
> process/client/group/node/user?

For resource partitioning mostly.  It's not a single user or purpose
use case.  The same device gets shared across unrelated workloads and
we need to guarantee differing levels of quality of service to each
regardless of the specifics of workload.  We actually need to be able
to control IO resources.

Thanks.

-- 
tejun

Thread

[PATCH V3 00/11] block-throttle: add .high limit Shaohua Li <shli@fb.com> - 2016-10-03 23:30 +0200
  [PATCH v3 10/11] block-throttle: add a simple idle detection Shaohua Li <shli@fb.com> - 2016-10-03 23:30 +0200
  [PATCH v3 07/11] blk-throttle: make throtl_slice tunable Shaohua Li <shli@fb.com> - 2016-10-03 23:30 +0200
  [PATCH v3 08/11] blk-throttle: detect completed idle cgroup Shaohua Li <shli@fb.com> - 2016-10-03 23:30 +0200
  [PATCH v3 06/11] blk-throttle: make sure expire time isn't too big Shaohua Li <shli@fb.com> - 2016-10-03 23:30 +0200
  [PATCH v3 11/11] blk-throttle: ignore idle cgroup limit Shaohua Li <shli@fb.com> - 2016-10-03 23:30 +0200
  [PATCH v3 09/11] block-throttle: make bandwidth change smooth Shaohua Li <shli@fb.com> - 2016-10-03 23:30 +0200
  [PATCH v3 03/11] block-throttle: configure bps/iops limit for cgroup in high limit Shaohua Li <shli@fb.com> - 2016-10-03 23:30 +0200
  [PATCH v3 01/11] block-throttle: prepare support multiple limits Shaohua Li <shli@fb.com> - 2016-10-03 23:30 +0200
  [PATCH v3 02/11] block-throttle: add .high interface Shaohua Li <shli@fb.com> - 2016-10-03 23:30 +0200
  Re: [PATCH V3 00/11] block-throttle: add .high limit Vivek Goyal <vgoyal@redhat.com> - 2016-10-04 15:30 +0200
    Re: [PATCH V3 00/11] block-throttle: add .high limit Tejun Heo <tj@kernel.org> - 2016-10-04 18:00 +0200
      Re: [PATCH V3 00/11] block-throttle: add .high limit Tejun Heo <tj@kernel.org> - 2016-10-04 18:30 +0200
        Re: [PATCH V3 00/11] block-throttle: add .high limit Paolo Valente <paolo.valente@unimore.it> - 2016-10-04 19:10 +0200
          Re: [PATCH V3 00/11] block-throttle: add .high limit Paolo Valente <paolo.valente@unimore.it> - 2016-10-04 19:50 +0200
            Re: [PATCH V3 00/11] block-throttle: add .high limit Tejun Heo <tj@kernel.org> - 2016-10-04 21:00 +0200
              Re: [PATCH V3 00/11] block-throttle: add .high limit Paolo Valente <paolo.valente@unimore.it> - 2016-10-04 21:10 +0200
                Re: [PATCH V3 00/11] block-throttle: add .high limit Tejun Heo <tj@kernel.org> - 2016-10-04 21:20 +0200
                Re: [PATCH V3 00/11] block-throttle: add .high limit Paolo Valente <paolo.valente@unimore.it> - 2016-10-04 21:40 +0200
                Re: [PATCH V3 00/11] block-throttle: add .high limit Tejun Heo <tj@kernel.org> - 2016-10-04 22:30 +0200
                Re: [PATCH V3 00/11] block-throttle: add .high limit Paolo Valente <paolo.valente@unimore.it> - 2016-10-05 14:40 +0200
                Re: [PATCH V3 00/11] block-throttle: add .high limit Vivek Goyal <vgoyal@redhat.com> - 2016-10-05 15:20 +0200
                Re: [PATCH V3 00/11] block-throttle: add .high limit Paolo Valente <paolo.valente@unimore.it> - 2016-10-05 16:10 +0200
                Re: [PATCH V3 00/11] block-throttle: add .high limit Tejun Heo <tj@kernel.org> - 2016-10-05 17:00 +0200
                Re: [PATCH V3 00/11] block-throttle: add .high limit Paolo Valente <paolo.valente@unimore.it> - 2016-10-05 21:50 +0200
                Re: [PATCH V3 00/11] block-throttle: add .high limit Paolo Valente <paolo.valente@unimore.it> - 2016-10-05 22:10 +0200
                Re: [PATCH V3 00/11] block-throttle: add .high limit Paolo Valente <paolo.valente@unimore.it> - 2016-10-06 10:00 +0200
                Re: [PATCH V3 00/11] block-throttle: add .high limit Paolo Valente <paolo.valente@unimore.it> - 2016-10-06 15:20 +0200
                Re: [PATCH V3 00/11] block-throttle: add .high limit Vivek Goyal <vgoyal@redhat.com> - 2016-10-06 19:50 +0200
                Re: [PATCH V3 00/11] block-throttle: add .high limit Paolo Valente <paolo.valente@unimore.it> - 2016-10-06 20:10 +0200
                Re: [PATCH V3 00/11] block-throttle: add .high limit Vivek Goyal <vgoyal@redhat.com> - 2016-10-06 20:40 +0200
                Re: [PATCH V3 00/11] block-throttle: add .high limit Paolo Valente <paolo.valente@unimore.it> - 2016-10-06 23:00 +0200
                Re: [PATCH V3 00/11] block-throttle: add .high limit Mark Brown <broonie@kernel.org> - 2016-10-06 21:50 +0200
                Re: [PATCH V3 00/11] block-throttle: add .high limit Paolo Valente <paolo.valente@unimore.it> - 2016-10-07 00:30 +0200
                Re: [PATCH V3 00/11] block-throttle: add .high limit Paolo Valente <paolo.valente@unimore.it> - 2016-10-05 22:00 +0200
                Re: [PATCH V3 00/11] block-throttle: add .high limit Paolo Valente <paolo.valente@unimore.it> - 2016-10-06 09:30 +0200
                Fwd: [PATCH V3 00/11] block-throttle: add .high limit Kyle Sanderson <kyle.leet@gmail.com> - 2016-10-09 03:20 +0200
                Re: [PATCH V3 00/11] block-throttle: add .high limit Linus Walleij <linus.walleij@linaro.org> - 2016-10-06 10:10 +0200
                Re: [PATCH V3 00/11] block-throttle: add .high limit Mark Brown <broonie@kernel.org> - 2016-10-06 13:10 +0200
                Re: [PATCH V3 00/11] block-throttle: add .high limit "Austin S. Hemmelgarn" <ahferroin7@gmail.com> - 2016-10-06 14:00 +0200
                Re: [PATCH V3 00/11] block-throttle: add .high limit Paolo Valente <paolo.valente@unimore.it> - 2016-10-06 15:00 +0200
                Re: [PATCH V3 00/11] block-throttle: add .high limit "Austin S. Hemmelgarn" <ahferroin7@gmail.com> - 2016-10-06 16:00 +0200
                Re: [PATCH V3 00/11] block-throttle: add .high limit Paolo Valente <paolo.valente@unimore.it> - 2016-10-06 17:10 +0200
                Re: [PATCH V3 00/11] block-throttle: add .high limit "Austin S. Hemmelgarn" <ahferroin7@gmail.com> - 2016-10-06 17:20 +0200
                Re: [PATCH V3 00/11] block-throttle: add .high limit Heinz Diehl <htd+ml@fritha.org> - 2016-10-08 12:50 +0200
            Re: [PATCH V3 00/11] block-throttle: add .high limit Paolo Valente <paolo.valente@unimore.it> - 2016-10-04 21:50 +0200
      Re: [PATCH V3 00/11] block-throttle: add .high limit Paolo Valente <paolo.valente@unimore.it> - 2016-10-04 18:30 +0200
      Re: [PATCH V3 00/11] block-throttle: add .high limit Vivek Goyal <vgoyal@redhat.com> - 2016-10-04 20:20 +0200
        Re: [PATCH V3 00/11] block-throttle: add .high limit Tejun Heo <tj@kernel.org> - 2016-10-04 21:00 +0200
          Re: [PATCH V3 00/11] block-throttle: add .high limit Paolo Valente <paolo.valente@unimore.it> - 2016-10-04 21:00 +0200

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