linux-kernel - Re: [PATCH 0/4] Show cpu cgroup's nr_running and nr

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Message-ID: <20171106160438.GJ3165@worktop.lehotels.local>
Date:   Mon, 6 Nov 2017 17:04:38 +0100
From:   Peter Zijlstra <peterz@...radead.org>
To:     Kirill Tkhai <ktkhai@...tuozzo.com>
Cc:     mingo@...hat.com, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 0/4] Show cpu cgroup's nr_running and nr_iowait     in
 cpu.stat file

On Mon, Nov 06, 2017 at 05:40:15PM +0300, Kirill Tkhai wrote:
> The patchset exports numbers of cpu cgroup's running tasks and tasks in iowait
> to userspace. This may be useful to get statistics of a separate container and
> to analyse its load.

NAK on the iowait thing. That should not be exposed ever.

Also read commit:

  e33a9bba85a8 ("sched/core: move IO scheduling accounting from io_schedule_timeout() into scheduler")