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Re: [patch 2/2] MM: allow per-cpu vmstat_threshold and vmstat_worker configuration

From Christoph Lameter <cl@linux.com>
Newsgroups linux.kernel
Subject Re: [patch 2/2] MM: allow per-cpu vmstat_threshold and vmstat_worker configuration
Date 2017-05-22 18:40 +0200
Message-ID <tJYxb-83k-1@gated-at.bofh.it> (permalink)
References (8 earlier) <tHtHd-3KQ-37@gated-at.bofh.it> <tHKRH-6cj-11@gated-at.bofh.it> <tIReq-3xO-17@gated-at.bofh.it> <tITJf-5fr-9@gated-at.bofh.it> <tIUlY-5uX-25@gated-at.bofh.it>
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On Fri, 19 May 2017, Luiz Capitulino wrote:

> Something that crossed my mind was to add a new tunable to set
> the vmstat_interval for each CPU, this way we could essentially
> disable it to the CPUs where DPDK is running. What's the implications
> of doing this besides not getting up to date stats in /proc/vmstat
> (which I still have to confirm would be OK)? Can this break anything
> in the kernel for example?

The data is still going to be updated when the differential gets to big.

Increasing the vmstat interval and reducing the differential threshold
would get your there....

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Thread

Re: [patch 2/2] MM: allow per-cpu vmstat_threshold and vmstat_worker  configuration Marcelo Tosatti <mtosatti@redhat.com> - 2017-05-12 14:30 +0200
  Re: [patch 2/2] MM: allow per-cpu vmstat_threshold and vmstat_worker  configuration Christoph Lameter <cl@linux.com> - 2017-05-12 17:20 +0200
    Re: [patch 2/2] MM: allow per-cpu vmstat_threshold and vmstat_worker  configuration Marcelo Tosatti <mtosatti@redhat.com> - 2017-05-12 17:50 +0200
      Re: [patch 2/2] MM: allow per-cpu vmstat_threshold and vmstat_worker  configuration Christoph Lameter <cl@linux.com> - 2017-05-12 18:10 +0200
      Re: [patch 2/2] MM: allow per-cpu vmstat_threshold and vmstat_worker  configuration Christoph Lameter <cl@linux.com> - 2017-05-12 18:10 +0200
        Re: [patch 2/2] MM: allow per-cpu vmstat_threshold and vmstat_worker  configuration Marcelo Tosatti <mtosatti@redhat.com> - 2017-05-12 18:30 +0200
          Re: [patch 2/2] MM: allow per-cpu vmstat_threshold and vmstat_worker  configuration Christoph Lameter <cl@linux.com> - 2017-05-12 19:00 +0200
            Re: [patch 2/2] MM: allow per-cpu vmstat_threshold and vmstat_worker  configuration Marcelo Tosatti <mtosatti@redhat.com> - 2017-05-15 21:20 +0200
              Re: [patch 2/2] MM: allow per-cpu vmstat_threshold and vmstat_worker  configuration Christoph Lameter <cl@linux.com> - 2017-05-16 15:40 +0200
                Re: [patch 2/2] MM: allow per-cpu vmstat_threshold and vmstat_worker  configuration Marcelo Tosatti <mtosatti@redhat.com> - 2017-05-19 16:40 +0200
                Re: [patch 2/2] MM: allow per-cpu vmstat_threshold and vmstat_worker  configuration Christoph Lameter <cl@linux.com> - 2017-05-19 19:20 +0200
                Re: [patch 2/2] MM: allow per-cpu vmstat_threshold and  vmstat_worker configuration Luiz Capitulino <lcapitulino@redhat.com> - 2017-05-19 20:00 +0200
                Re: [patch 2/2] MM: allow per-cpu vmstat_threshold and vmstat_worker  configuration Christoph Lameter <cl@linux.com> - 2017-05-22 18:40 +0200
                Re: [patch 2/2] MM: allow per-cpu vmstat_threshold and vmstat_worker  configuration Marcelo Tosatti <mtosatti@redhat.com> - 2017-05-20 10:30 +0200
                Re: [patch 2/2] MM: allow per-cpu vmstat_threshold and vmstat_worker  configuration Christoph Lameter <cl@linux.com> - 2017-05-22 18:40 +0200
                Re: [patch 2/2] MM: allow per-cpu vmstat_threshold and vmstat_worker  configuration Marcelo Tosatti <mtosatti@redhat.com> - 2017-05-22 23:20 +0200

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