linux-kernel - Re: [PATCH]: x86: use acpi flags for apic mapping

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Message-ID: <4C081B4A.4060801@redhat.com>
Date:	Thu, 03 Jun 2010 17:14:50 -0400
From:	Prarit Bhargava <prarit@...hat.com>
To:	Yinghai Lu <yinghai.lu@...cle.com>
CC:	Cyrill Gorcunov <gorcunov@...il.com>, linux-kernel@...r.kernel.org,
	linux-acpi@...r.kernel.org, mjg@...hat.com, x86@...nel.org,
	Thomas Gleixner <tglx@...utronix.de>,
	"H. Peter Anvin" <hpa@...or.com>,
	Suresh Siddha <suresh.b.siddha@...el.com>
Subject: Re: [PATCH]: x86: use acpi flags for apic mapping


> It seems we don't need this patch.
>
> so all system should support phys apic mode, but system with less 8 cpus is supposed to support cluster mode for better performance.
>
> current kernel will try to use cluster mode if nr_cpus is less than 8.
>
> some system have problem like IBM and NCR only support phys apic mode even cpus < 8 ...
>
>   

What about systems that have set the ACPI values?  We just ignore those
then?

P.

> Thanks
>
> Yinghai
>
>   
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