linux-kernel - Re: [RFC 8/8] x86_64: Support for new UV apic

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Message-ID: <86802c440803301920o47335876yac12a5a09d1a8cc9@mail.gmail.com>
Date:	Sun, 30 Mar 2008 19:20:11 -0700
From:	"Yinghai Lu" <yhlu.kernel@...il.com>
To:	"Jack Steiner" <steiner@....com>
Cc:	"Andi Kleen" <andi@...stfloor.org>, "Ingo Molnar" <mingo@...e.hu>,
	tglx@...utronix.de, linux-mm@...ck.org,
	linux-kernel@...r.kernel.org
Subject: Re: [RFC 8/8] x86_64: Support for new UV apic

On Sun, Mar 30, 2008 at 7:18 PM, Jack Steiner <steiner@....com> wrote:
> >
>  > if the calling path like GET_APIC_ID is keeping checking if it is UV
>  > box after boot time, that may not good.
>  >
>  > don't need make other hundreds of machine keep running the code only
>  > for several big box all the time.
>  >
>  > YH
>
>
>  I added trace code to see how often GET_APIC_ID() is called. For
>  my 8p AMD box, the  function is called 6 times per cpu during boot.
>  I have not seen any other calls to the function after early boot
>  although I'm they occur under some circumstances.

then it is ok.

YH
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