Re: [PATCH] mm,vmscan: Use accurate values for zone_reclaimable() checks

From	Christoph Lameter <cl@linux.com>
Newsgroups	linux.kernel
Subject	Re: [PATCH] mm,vmscan: Use accurate values for zone_reclaimable() checks
Date	2015-11-05 18:50 +0100
Message-ID	<qrwPD-1jX-5@gated-at.bofh.it> (permalink)
References	(1 earlier) <qmplM-5wh-23@gated-at.bofh.it> <qmpOO-6iz-29@gated-at.bofh.it> <qmC9j-7jL-1@gated-at.bofh.it> <qqoUa-6R3-21@gated-at.bofh.it> <qrukO-8kv-11@gated-at.bofh.it>
Organization	linux.* mail to news gateway

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On Thu, 5 Nov 2015, Tetsuo Handa wrote:

> memory allocation. By allowing workqueue items to be processed (by using
> short sleep), some task might release memory when workqueue item is
> processed.
>
> Therefore, not only to keep vmstat counters up to date, but also for
> avoid wasting CPU cycles, I prefer a short sleep.

Sorry but we need work queue processing for vmstat counters that is
independent of other requests submitted that may block. Adding points
where we sleep / schedule everywhere to do this is not the right approach.

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Thread

Re: [PATCH] mm,vmscan: Use accurate values for zone_reclaimable()  checks Michal Hocko <mhocko@kernel.org> - 2015-11-02 16:10 +0100
  Re: [PATCH] mm,vmscan: Use accurate values for zone_reclaimable()  checks Tejun Heo <htejun@gmail.com> - 2015-11-02 20:30 +0100
    Re: [PATCH] mm,vmscan: Use accurate values for zone_reclaimable() checks Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> - 2015-11-03 03:40 +0100
      Re: [PATCH] mm,vmscan: Use accurate values for zone_reclaimable()  checks Tejun Heo <htejun@gmail.com> - 2015-11-03 20:50 +0100
  Re: [PATCH] mm,vmscan: Use accurate values for zone_reclaimable() checks Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> - 2015-11-05 16:10 +0100
    Re: [PATCH] mm,vmscan: Use accurate values for zone_reclaimable()  checks Christoph Lameter <cl@linux.com> - 2015-11-05 18:50 +0100
      Re: [PATCH] mm,vmscan: Use accurate values for zone_reclaimable()  checks Tejun Heo <htejun@gmail.com> - 2015-11-06 01:20 +0100
        Re: [PATCH] mm,vmscan: Use accurate values for zone_reclaimable()  checks Michal Hocko <mhocko@kernel.org> - 2015-11-11 16:50 +0100
          Re: [PATCH] mm,vmscan: Use accurate values for zone_reclaimable()  checks Michal Hocko <mhocko@kernel.org> - 2015-11-11 17:10 +0100

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