linux-kernel - Re: [PATCH] docs: scheduler: Update new path for the sysctl knobs

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Date:   Mon, 29 Aug 2022 10:59:50 +0100
From:   Lukasz Luba <lukasz.luba@....com>
To:     corbet@....net
Cc:     siyanteng@...ngson.cn, alexs@...nel.org, peterz@...radead.org,
        linux-doc@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] docs: scheduler: Update new path for the sysctl knobs

Hi Jonathan,


On 8/16/22 13:19, Lukasz Luba wrote:
> Add missing update for the documentation bit of some scheduler knob.
> The knobs have been moved to /debug/sched/ location (with adjusted names).
> 
> Signed-off-by: Lukasz Luba <lukasz.luba@....com>
> ---
>   Documentation/scheduler/sched-design-CFS.rst                    | 2 +-
>   Documentation/translations/zh_CN/scheduler/sched-design-CFS.rst | 2 +-
>   2 files changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/Documentation/scheduler/sched-design-CFS.rst b/Documentation/scheduler/sched-design-CFS.rst
> index 59b2d1fb4dc4..03db55504515 100644
> --- a/Documentation/scheduler/sched-design-CFS.rst
> +++ b/Documentation/scheduler/sched-design-CFS.rst
> @@ -94,7 +94,7 @@ other HZ detail.  Thus the CFS scheduler has no notion of "timeslices" in the
>   way the previous scheduler had, and has no heuristics whatsoever.  There is
>   only one central tunable (you have to switch on CONFIG_SCHED_DEBUG):
>   
> -   /proc/sys/kernel/sched_min_granularity_ns
> +   /sys/kernel/debug/sched/min_granularity_ns
>   
>   which can be used to tune the scheduler from "desktop" (i.e., low latencies) to
>   "server" (i.e., good batching) workloads.  It defaults to a setting suitable
> diff --git a/Documentation/translations/zh_CN/scheduler/sched-design-CFS.rst b/Documentation/translations/zh_CN/scheduler/sched-design-CFS.rst
> index 26b0f36f793d..3076402406c4 100644
> --- a/Documentation/translations/zh_CN/scheduler/sched-design-CFS.rst
> +++ b/Documentation/translations/zh_CN/scheduler/sched-design-CFS.rst
> @@ -80,7 +80,7 @@ p->se.vruntime。一旦p->se.vruntime变得足够大，其它的任务将成为
>   CFS使用纳秒粒度的计时，不依赖于任何jiffies或HZ的细节。因此CFS并不像之前的调度器那样
>   有“时间片”的概念，也没有任何启发式的设计。唯一可调的参数（你需要打开CONFIG_SCHED_DEBUG）是：
>   
> -   /proc/sys/kernel/sched_min_granularity_ns
> +   /sys/kernel/debug/sched/min_granularity_ns
>   
>   它可以用来将调度器从“桌面”模式（也就是低时延）调节为“服务器”（也就是高批处理）模式。
>   它的默认设置是适合桌面的工作负载。SCHED_BATCH也被CFS调度器模块处理。


Gentle ping. Could you take this patch, please?

Regards,
Lukasz