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Re: fast path cycle muncher (vmstat: make vmstat_updater deferrable again and shut down on idle)

From Mike Galbraith <umgwanakikbuti@gmail.com>
Newsgroups linux.kernel
Subject Re: fast path cycle muncher (vmstat: make vmstat_updater deferrable again and shut down on idle)
Date 2016-01-26 19:50 +0100
Message-ID <qVgQG-8cd-9@gated-at.bofh.it> (permalink)
References (9 earlier) <qUTKq-7UQ-17@gated-at.bofh.it> <qUVMf-PD-23@gated-at.bofh.it> <qVeFd-6F7-19@gated-at.bofh.it> <qVgH0-88L-15@gated-at.bofh.it> <qVgH0-88L-13@gated-at.bofh.it>
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On Tue, 2016-01-26 at 12:34 -0600, Christoph Lameter wrote:
> On Tue, 26 Jan 2016, Mike Galbraith wrote:
> 
> > I disagree.  You're burning electrons for no benefit at all to me on my
> > box.  You want to do high speed trading, that's fine, but I expect my
> > box to be able to pop in and out of idle without having to pay a toll
> > to the high speed trading bandits of the world, thank you very much.
> > 
> > This specialty thing does not belong in the generic fast path.
> 
> The system going idle is a fastpath. Mind boogling.

Hohum, noted.  Now what about those cycles, and the sleeping lock you
injected for -rt?

	-Mike

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Thread

Re: mm, vmstat: kernel BUG at mm/vmstat.c:1408! Michal Hocko <mhocko@kernel.org> - 2016-01-20 15:40 +0100
  Re: mm, vmstat: kernel BUG at mm/vmstat.c:1408! Sasha Levin <sasha.levin@oracle.com> - 2016-01-20 16:00 +0100
    Re: mm, vmstat: kernel BUG at mm/vmstat.c:1408! Michal Hocko <mhocko@kernel.org> - 2016-01-20 16:20 +0100
      Re: mm, vmstat: kernel BUG at mm/vmstat.c:1408! Christoph Lameter <cl@linux.com> - 2016-01-20 16:30 +0100
        Re: mm, vmstat: kernel BUG at mm/vmstat.c:1408! Sasha Levin <sasha.levin@oracle.com> - 2016-01-20 17:00 +0100
          Re: mm, vmstat: kernel BUG at mm/vmstat.c:1408! Christoph Lameter <cl@linux.com> - 2016-01-20 17:00 +0100
            Re: mm, vmstat: kernel BUG at mm/vmstat.c:1408! Michal Hocko <mhocko@kernel.org> - 2016-01-20 22:30 +0100
              Re: mm, vmstat: kernel BUG at mm/vmstat.c:1408! Christoph Lameter <cl@linux.com> - 2016-01-20 23:00 +0100
                Re: mm, vmstat: kernel BUG at mm/vmstat.c:1408! Michal Hocko <mhocko@kernel.org> - 2016-01-21 09:30 +0100
                Re: mm, vmstat: kernel BUG at mm/vmstat.c:1408! Christoph Lameter <cl@linux.com> - 2016-01-21 16:50 +0100
                Re: mm, vmstat: kernel BUG at mm/vmstat.c:1408! Michal Hocko <mhocko@kernel.org> - 2016-01-21 18:00 +0100
                Re: mm, vmstat: kernel BUG at mm/vmstat.c:1408! Christoph Lameter <cl@linux.com> - 2016-01-21 18:40 +0100
                Re: mm, vmstat: kernel BUG at mm/vmstat.c:1408! Shiraz Hashim <shiraz.linux.kernel@gmail.com> - 2016-01-22 12:10 +0100
                Re: mm, vmstat: kernel BUG at mm/vmstat.c:1408! Michal Hocko <mhocko@kernel.org> - 2016-01-22 15:10 +0100
                Re: mm, vmstat: kernel BUG at mm/vmstat.c:1408! Christoph Lameter <cl@linux.com> - 2016-01-22 17:10 +0100
                Re: mm, vmstat: kernel BUG at mm/vmstat.c:1408! Michal Hocko <mhocko@kernel.org> - 2016-01-22 17:20 +0100
                Re: mm, vmstat: kernel BUG at mm/vmstat.c:1408! Christoph Lameter <cl@linux.com> - 2016-01-22 17:50 +0100
                Re: mm, vmstat: kernel BUG at mm/vmstat.c:1408! Michal Hocko <mhocko@kernel.org> - 2016-01-22 18:20 +0100
                fast path cycle muncher (vmstat: make vmstat_updater deferrable  again and shut down on idle) Mike Galbraith <umgwanakikbuti@gmail.com> - 2016-01-23 17:30 +0100
                Re: fast path cycle muncher (vmstat: make vmstat_updater deferrable  again and shut down on idle) Christoph Lameter <cl@linux.com> - 2016-01-24 01:40 +0100
                Re: fast path cycle muncher (vmstat: make vmstat_updater deferrable  again and shut down on idle) Mike Galbraith <umgwanakikbuti@gmail.com> - 2016-01-24 03:50 +0100
                Re: fast path cycle muncher (vmstat: make vmstat_updater deferrable  again and shut down on idle) Christoph Lameter <cl@linux.com> - 2016-01-24 04:50 +0100
                Re: fast path cycle muncher (vmstat: make vmstat_updater deferrable  again and shut down on idle) Mike Galbraith <umgwanakikbuti@gmail.com> - 2016-01-24 06:40 +0100
                Re: fast path cycle muncher (vmstat: make vmstat_updater deferrable  again and shut down on idle) Michal Hocko <mhocko@kernel.org> - 2016-01-25 18:50 +0100
                Re: fast path cycle muncher (vmstat: make vmstat_updater deferrable  again and shut down on idle) Christoph Lameter <cl@linux.com> - 2016-01-25 19:10 +0100
                Re: fast path cycle muncher (vmstat: make vmstat_updater deferrable  again and shut down on idle) Michal Hocko <mhocko@kernel.org> - 2016-01-25 21:20 +0100
                Re: fast path cycle muncher (vmstat: make vmstat_updater deferrable  again and shut down on idle) Christoph Lameter <cl@linux.com> - 2016-01-26 17:30 +0100
                Re: fast path cycle muncher (vmstat: make vmstat_updater deferrable  again and shut down on idle) Christoph Lameter <cl@linux.com> - 2016-01-26 19:40 +0100
                Re: fast path cycle muncher (vmstat: make vmstat_updater deferrable  again and shut down on idle) Mike Galbraith <umgwanakikbuti@gmail.com> - 2016-01-26 19:50 +0100
                Re: fast path cycle muncher (vmstat: make vmstat_updater deferrable  again and shut down on idle) Christoph Lameter <cl@linux.com> - 2016-01-26 20:30 +0100
                Re: fast path cycle muncher (vmstat: make vmstat_updater deferrable  again and shut down on idle) Mike Galbraith <umgwanakikbuti@gmail.com> - 2016-01-27 04:20 +0100
                Re: fast path cycle muncher (vmstat: make vmstat_updater deferrable  again and shut down on idle) Mike Galbraith <umgwanakikbuti@gmail.com> - 2016-01-27 05:20 +0100
                Re: fast path cycle muncher (vmstat: make vmstat_updater deferrable  again and shut down on idle) Christoph Lameter <cl@linux.com> - 2016-01-27 17:30 +0100
                Re: fast path cycle muncher (vmstat: make vmstat_updater deferrable  again and shut down on idle) Mike Galbraith <umgwanakikbuti@gmail.com> - 2016-01-26 19:40 +0100
                Re: fast path cycle muncher (vmstat: make vmstat_updater deferrable  again and shut down on idle) Mike Galbraith <umgwanakikbuti@gmail.com> - 2016-01-26 03:20 +0100
                Re: fast path cycle muncher (vmstat: make vmstat_updater deferrable  again and shut down on idle) Mike Galbraith <umgwanakikbuti@gmail.com> - 2016-01-26 03:30 +0100
                Re: fast path cycle muncher (vmstat: make vmstat_updater deferrable  again and shut down on idle) Christoph Lameter <cl@linux.com> - 2016-01-26 17:30 +0100
                Re: fast path cycle muncher (vmstat: make vmstat_updater deferrable  again and shut down on idle) Mike Galbraith <umgwanakikbuti@gmail.com> - 2016-01-26 18:40 +0100
                Re: fast path cycle muncher (vmstat: make vmstat_updater deferrable  again and shut down on idle) Christoph Lameter <cl@linux.com> - 2016-01-26 19:20 +0100
                Re: fast path cycle muncher (vmstat: make vmstat_updater deferrable  again and shut down on idle) Christoph Lameter <cl@linux.com> - 2016-01-26 17:30 +0100
                Re: fast path cycle muncher (vmstat: make vmstat_updater deferrable  again and shut down on idle) Mike Galbraith <umgwanakikbuti@gmail.com> - 2016-01-26 18:10 +0100
                Re: fast path cycle muncher (vmstat: make vmstat_updater deferrable  again and shut down on idle) Christoph Lameter <cl@linux.com> - 2016-01-26 19:30 +0100
                Re: fast path cycle muncher (vmstat: make vmstat_updater deferrable  again and shut down on idle) Mike Galbraith <umgwanakikbuti@gmail.com> - 2016-01-26 20:10 +0100
                Re: fast path cycle muncher (vmstat: make vmstat_updater deferrable  again and shut down on idle) Christoph Lameter <cl@linux.com> - 2016-01-26 20:30 +0100
                [PATCH] mm, vmstat: make quiet_vmstat lighter (was: Re: fast path  cycle muncher (vmstat: make vmstat_updater deferrable) again and shut down  on idle) Michal Hocko <mhocko@kernel.org> - 2016-01-27 17:50 +0100
                Re: [PATCH] mm, vmstat: make quiet_vmstat lighter (was: Re: fast  path cycle muncher (vmstat: make vmstat_updater deferrable) again and shut  down on idle) Mike Galbraith <umgwanakikbuti@gmail.com> - 2016-01-27 18:10 +0100
                Re: [PATCH] mm, vmstat: make quiet_vmstat lighter (was: Re: fast  path cycle muncher (vmstat: make vmstat_updater deferrable) again and shut  down on idle) Christoph Lameter <cl@linux.com> - 2016-01-27 19:30 +0100
                Re: mm, vmstat: kernel BUG at mm/vmstat.c:1408! Linus Torvalds <torvalds@linux-foundation.org> - 2016-01-24 18:00 +0100
  Re: mm, vmstat: kernel BUG at mm/vmstat.c:1408! Christoph Lameter <cl@linux.com> - 2016-01-20 16:20 +0100
    Re: mm, vmstat: kernel BUG at mm/vmstat.c:1408! Michal Hocko <mhocko@kernel.org> - 2016-01-20 16:30 +0100

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