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Re: [PATCH] vmstat: make vmstat_update deferrable (was: Re: [PATCH] mm, vmstat: make quiet_vmstat lighter) path cycle muncher (vmstat: make vmstat_updater deferrable) again and shut down on idle)

From	Christoph Lameter <cl@linux.com>
Newsgroups	linux.kernel
Subject	Re: [PATCH] vmstat: make vmstat_update deferrable (was: Re: [PATCH] mm, vmstat: make quiet_vmstat lighter) path cycle muncher (vmstat: make vmstat_updater deferrable) again and shut down on idle)
Date	2016-01-28 17:50 +0100
Message-ID	<qVXVE-69J-27@gated-at.bofh.it> (permalink)
References	(6 earlier) <qU9ey-5ik-15@gated-at.bofh.it> <qVBs7-6oZ-53@gated-at.bofh.it> <qVD0S-7IE-25@gated-at.bofh.it> <qVWPU-5sX-19@gated-at.bofh.it> <qVWPU-5sX-17@gated-at.bofh.it>
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On Thu, 28 Jan 2016, Michal Hocko wrote:

> down on idle") made vmstat_shepherd deferrable. vmstat_update itself
> is still using standard timer which might interrupt idle task. This
> is possible because "mm, vmstat: make quiet_vmstat lighter" removed
> cancel_delayed_work from the quiet_vmstat. Change vmstat_work to
> use DEFERRABLE_WORK to prevent from pointless wakeups from the idle
> context.

Acked-by: Christoph Lameter <cl@linux.com>

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[PATCH] vmstat: make vmstat_update deferrable (was: Re: [PATCH] mm,  vmstat: make quiet_vmstat lighter) path cycle muncher (vmstat: make  vmstat_updater deferrable) again and shut down on idle) Michal Hocko <mhocko@kernel.org> - 2016-01-28 16:40 +0100
  Re: [PATCH] vmstat: make vmstat_update deferrable (was: Re: [PATCH]  mm, vmstat: make quiet_vmstat lighter) path cycle muncher (vmstat: make  vmstat_updater deferrable) again and shut down on idle) Christoph Lameter <cl@linux.com> - 2016-01-28 17:50 +0100

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