linux-kernel - Re: [PATCH 25/27] Documentation: x86: convert x86

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Date:   Sat, 27 Apr 2019 15:38:22 -0300
From:   Mauro Carvalho Chehab <mchehab+samsung@...nel.org>
To:     Changbin Du <changbin.du@...il.com>
Cc:     Jonathan Corbet <corbet@....net>, tglx@...utronix.de,
        mingo@...hat.com, bp@...en8.de, x86@...nel.org,
        linux-doc@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 25/27] Documentation: x86: convert
 x86_64/fake-numa-for-cpusets to reST

Em Fri, 26 Apr 2019 23:31:48 +0800
Changbin Du <changbin.du@...il.com> escreveu:

> This converts the plain text documentation to reStructuredText format and
> add it to Sphinx TOC tree. No essential content change.
> 
> Signed-off-by: Changbin Du <changbin.du@...il.com>

Reviewed-by: Mauro Carvalho Chehab <mchehab+samsung@...nel.org>

> ---
>  ...-for-cpusets => fake-numa-for-cpusets.rst} | 25 +++++++++++++------
>  Documentation/x86/x86_64/index.rst            |  1 +
>  2 files changed, 19 insertions(+), 7 deletions(-)
>  rename Documentation/x86/x86_64/{fake-numa-for-cpusets => fake-numa-for-cpusets.rst} (85%)
> 
> diff --git a/Documentation/x86/x86_64/fake-numa-for-cpusets b/Documentation/x86/x86_64/fake-numa-for-cpusets.rst
> similarity index 85%
> rename from Documentation/x86/x86_64/fake-numa-for-cpusets
> rename to Documentation/x86/x86_64/fake-numa-for-cpusets.rst
> index 4b09f18831f8..74fbb78b3c67 100644
> --- a/Documentation/x86/x86_64/fake-numa-for-cpusets
> +++ b/Documentation/x86/x86_64/fake-numa-for-cpusets.rst
> @@ -1,5 +1,12 @@
> +.. SPDX-License-Identifier: GPL-2.0
> +
> +=====================
> +Fake NUMA For CPUSets
> +=====================
> +
> +:Author: David Rientjes <rientjes@...washington.edu>
> +
>  Using numa=fake and CPUSets for Resource Management
> -Written by David Rientjes <rientjes@...washington.edu>
>  
>  This document describes how the numa=fake x86_64 command-line option can be used
>  in conjunction with cpusets for coarse memory management.  Using this feature,
> @@ -20,7 +27,7 @@ you become more familiar with using this combination for resource control,
>  you'll determine a better setup to minimize the number of nodes you have to deal
>  with.
>  
> -A machine may be split as follows with "numa=fake=4*512," as reported by dmesg:
> +A machine may be split as follows with "numa=fake=4*512," as reported by dmesg::
>  
>  	Faking node 0 at 0000000000000000-0000000020000000 (512MB)
>  	Faking node 1 at 0000000020000000-0000000040000000 (512MB)
> @@ -34,7 +41,7 @@ A machine may be split as follows with "numa=fake=4*512," as reported by dmesg:
>  
>  Now following the instructions for mounting the cpusets filesystem from
>  Documentation/cgroup-v1/cpusets.txt, you can assign fake nodes (i.e. contiguous memory
> -address spaces) to individual cpusets:
> +address spaces) to individual cpusets::
>  
>  	[root@...ads /]# mkdir exampleset
>  	[root@...ads /]# mount -t cpuset none exampleset
> @@ -47,7 +54,7 @@ Now this cpuset, 'ddset', will only allowed access to fake nodes 0 and 1 for
>  memory allocations (1G).
>  
>  You can now assign tasks to these cpusets to limit the memory resources
> -available to them according to the fake nodes assigned as mems:
> +available to them according to the fake nodes assigned as mems::
>  
>  	[root@...ads /exampleset/ddset]# echo $$ > tasks
>  	[root@...ads /exampleset/ddset]# dd if=/dev/zero of=tmp bs=1024 count=1G
> @@ -57,9 +64,13 @@ Notice the difference between the system memory usage as reported by
>  /proc/meminfo between the restricted cpuset case above and the unrestricted
>  case (i.e. running the same 'dd' command without assigning it to a fake NUMA
>  cpuset):
> -				Unrestricted	Restricted
> -	MemTotal:		3091900 kB	3091900 kB
> -	MemFree:		  42113 kB	1513236 kB
> +
> +	========	============	==========
> +	Name		Unrestricted	Restricted
> +	========	============	==========
> +	MemTotal	3091900 kB	3091900 kB
> +	MemFree		42113 kB	1513236 kB
> +	========	============	==========
>  
>  This allows for coarse memory management for the tasks you assign to particular
>  cpusets.  Since cpusets can form a hierarchy, you can create some pretty
> diff --git a/Documentation/x86/x86_64/index.rst b/Documentation/x86/x86_64/index.rst
> index 7b8c82151358..e2a324cde671 100644
> --- a/Documentation/x86/x86_64/index.rst
> +++ b/Documentation/x86/x86_64/index.rst
> @@ -11,3 +11,4 @@ x86_64 Support
>     uefi
>     mm
>     5level-paging
> +   fake-numa-for-cpusets



Thanks,
Mauro