linux-kernel - Re: [PATCH] docs: document the sysfs ABI for "nohz

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Date:   Wed, 1 Dec 2021 08:34:36 +0100
From:   Greg KH <gregkh@...uxfoundation.org>
To:     Kohei Tarumizu <tarumizu.kohei@...itsu.com>
Cc:     linux-kernel@...r.kernel.org, riel@...hat.com,
        mchehab+huawei@...nel.org, will@...nel.org,
        catalin.marinas@....com, corbet@....net, ionela.voinescu@....com,
        pcc@...gle.com, bilbao@...edu, matorola@...il.com,
        rafael@...nel.org
Subject: Re: [PATCH] docs: document the sysfs ABI for "nohz_full" and
 "isolated"

On Wed, Dec 01, 2021 at 04:18:52PM +0900, Kohei Tarumizu wrote:
> Add missing documentation of sysfs ABI for "nohz_full" and "isolated".
> "nohz_full" was added by commit 6570a9a1ce3a("show nohz_full cpus in
> sysfs") and "isolated" was added by commit 59f30abe94bf("show isolated
> cpus in sysfs"). However, there is no documentation for these
> interface.
> 
> Signed-off-by: Kohei Tarumizu <tarumizu.kohei@...itsu.com>
> ---
>  Documentation/ABI/testing/sysfs-devices-system-cpu | 13 +++++++++++++
>  1 file changed, 13 insertions(+)
> 
> diff --git a/Documentation/ABI/testing/sysfs-devices-system-cpu b/Documentation/ABI/testing/sysfs-devices-system-cpu
> index 69c65da16dff..a9d5d87b6a41 100644
> --- a/Documentation/ABI/testing/sysfs-devices-system-cpu
> +++ b/Documentation/ABI/testing/sysfs-devices-system-cpu
> @@ -666,3 +666,16 @@ Description:	Preferred MTE tag checking mode
>  		================  ==============================================
>  
>  		See also: Documentation/arm64/memory-tagging-extension.rst
> +
> +What:		/sys/devices/system/cpu/nohz_full
> +		/sys/devices/system/cpu/isolated
> +Date:		Apr 2015
> +Contact:	Linux kernel mailing list <linux-kernel@...r.kernel.org>
> +Description:	information about CPU isolation.
> +
> +		nohz_full: (RO) the list of CPUs that are in nohz_full mode.
> +			   These CPUs are set by boot parameter "nohz_full=".
> +
> +		isolated: (RO) the list of CPUs that are isolated and don't
> +			  participate in load balancing. These CPUs are set by
> +			  boot parameter "isolcpus=".

These should be two different entries, not one please.

thanks,

greg k-h