Message-ID: <48688EDB.4020908@cn.fujitsu.com>
Date: Mon, 30 Jun 2008 15:44:27 +0800
From: Li Zefan <lizf@cn.fujitsu.com>
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To: Hidetoshi Seto <seto.hidetoshi@jp.fujitsu.com>
CC: Paul Jackson <pj@sgi.com>, Andrew Morton <akpm@linux-foundation.org>,
       Lee.Schermerhorn@hp.com, linux-kernel@vger.kernel.org,
       Michael Kerrisk <mtk.manpages@googlemail.com>, rientjes@google.com
Subject: Re: [PATCH] doc: Document the relax_domain_level kernel boot argument
References: <20080630045640.20308.22031.sendpatchset@polaris-admin.engr.sgi.com> <486883D0.8070409@jp.fujitsu.com> <486887EB.5090304@cn.fujitsu.com> <48688DDE.9060802@jp.fujitsu.com>
In-Reply-To: <48688DDE.9060802@jp.fujitsu.com>
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Hidetoshi Seto wrote:
> Li Zefan wrote:
>> Hidetoshi Seto wrote:
>>> The system default is architecture dependent. You can change your
>>> system's default using the relax_domain_level= boot parameter.
>> but the system default is 0 by default. and 0 means no search no matter
>> what architecture is. ;)
> 
> If my git pull works correctly, it seems that the default is still -1...
> 

Ah, yes, it's my mistake. :(

> [kernel/sched.c]
>> static int default_relax_domain_level = -1;
> 
> AFAIK, for example, x86(SMT) search siblings by default.
> 

So the system default is architecture depentdent.

> Thanks,
> H.Seto
> 
> 
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