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Date:      Sat, 14 Apr 2012 22:29:32 +0100
From:      Attilio Rao <attilio@freebsd.org>
To:        Mahesh Babu <maheshbabu90@yahoo.co.in>
Cc:        "freebsd-hackers@freebsd.org" <freebsd-hackers@freebsd.org>
Subject:   Re: Regarding core disable in FreeBSD 9
Message-ID:  <CAJ-FndDFN78CGzpOgZuGHTZ-NbE_2iLhBrcTHk8EuzhaxNuVtg@mail.gmail.com>
In-Reply-To: <1334333913.65753.YahooMailNeo@web193204.mail.sg3.yahoo.com>
References:  <1334333913.65753.YahooMailNeo@web193204.mail.sg3.yahoo.com>

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Il 13 aprile 2012 17:18, Mahesh Babu <maheshbabu90@yahoo.co.in> ha scritto:
> How to disable a particular core in FreeBSD 9?
> How to enable it again?

You can disable specific core at boot time by using the tunable:
hint.lapic.X.disabled=1

where X is the APIC ID of the CPU you want to turn off.

Attilio


-- 
Peace can only be achieved by understanding - A. Einstein



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