linux-kernel - Re: [PATCH] doc: Document the relax_domain

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Message-ID: <cfd18e0f0806300010n2141fd39s3983143c9aeb97b8@mail.gmail.com>
Date:	Mon, 30 Jun 2008 09:10:44 +0200
From:	"Michael Kerrisk" <mtk.manpages@...glemail.com>
To:	"Li Zefan" <lizf@...fujitsu.com>
Cc:	"Paul Jackson" <pj@....com>,
	"Andrew Morton" <akpm@...ux-foundation.org>,
	Lee.Schermerhorn@...com,
	"Hidetoshi Seto" <seto.hidetoshi@...fujitsu.com>,
	linux-kernel@...r.kernel.org, rientjes@...gle.com
Subject: Re: [PATCH] doc: Document the relax_domain_level kernel boot argument

On Mon, Jun 30, 2008 at 8:08 AM, Li Zefan <lizf@...fujitsu.com> wrote:
> Paul Jackson wrote:
>> From: Paul Jackson <pj@....com>
>>
>> Document the kernel boot parameter: relax_domain_level=.
>>
>> Signed-off-by: Paul Jackson <pj@....com>
>>
>> ---
>>  Documentation/cpusets.txt           |    3 +++
>>  Documentation/kernel-parameters.txt |    4 ++++
>>  2 files changed, 7 insertions(+)
>>
>> --- 2.6.26-rc5-mm3.orig/Documentation/cpusets.txt     2008-06-27 06:55:34.000000000 -0700
>> +++ 2.6.26-rc5-mm3/Documentation/cpusets.txt  2008-06-29 21:49:53.984674621 -0700
>> @@ -546,6 +546,9 @@ otherwise initial value -1 that indicate
>>   ( 4  : search nodes in a chunk of node [on NUMA system] )
>>   ( 5~ : search system wide [on NUMA system])
>>
>> +The system default is 0 (no search).  The system default can be
>> +changed using the relax_domain_level= boot parameter.
>> +
>>  This file is per-cpuset and affect the sched domain where the cpuset
>>  belongs to.  Therefore if the flag 'sched_load_balance' of a cpuset
>>  is disabled, then 'sched_relax_domain_level' have no effect since
>> --- 2.6.26-rc5-mm3.orig/Documentation/kernel-parameters.txt   2008-06-27 06:28:26.000000000 -0700
>> +++ 2.6.26-rc5-mm3/Documentation/kernel-parameters.txt        2008-06-29 21:51:10.477997208 -0700
>> @@ -1732,6 +1732,10 @@ and is between 256 and 4096 characters.
>>                       Format: <reboot_mode>[,<reboot_mode2>[,...]]
>>                       See arch/*/kernel/reboot.c or arch/*/kernel/process.c
>>
>> +     relax_domain_level=
>> +                     [KNL, SMP] Set schedulers default relax_domain_level.
>> +                     See Documentation/cpusets.txt.
>> +
>
> is [KNL,SMP] more consistent ?
>
> and s/schedulers/scheduler's/
>
> but maybe I'm wrong due to my English skill.

You are right.  (Paul doesn't like apostrophes ;-).)

>>       reserve=        [KNL,BUGS] Force the kernel to ignore some iomem area
>>
>>       reservetop=     [X86-32]
>>
>
> Reviewed-by: Li Zefan <lizf@...fujitsu.com>
>
>



-- 
Michael Kerrisk
Linux man-pages maintainer; http://www.kernel.org/doc/man-pages/
man-pages online: http://www.kernel.org/doc/man-pages/online_pages.html
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