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

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Date:	Mon, 30 Jun 2008 15:44:27 +0800
From:	Li Zefan <lizf@...fujitsu.com>
To:	Hidetoshi Seto <seto.hidetoshi@...fujitsu.com>
CC:	Paul Jackson <pj@....com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Lee.Schermerhorn@...com, linux-kernel@...r.kernel.org,
	Michael Kerrisk <mtk.manpages@...glemail.com>,
	rientjes@...gle.com
Subject: Re: [PATCH] doc: Document the relax_domain_level kernel boot argument

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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