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From: ebiederm@xmission.com (Eric W. Biederman)
To: Yinghai Lu <yinghai@kernel.org>
Cc: Thomas Gleixner <tglx@linutronix.de>, Ingo Molnar <mingo@redhat.com>,
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References: <4C66FEA9.3040303@kernel.org>
Date: Sun, 15 Aug 2010 08:55:00 -0700
In-Reply-To: <4C66FEA9.3040303@kernel.org> (Yinghai Lu's message of "Sat, 14
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Subject: Re: [PATCH] x86: Don't write io_apic ID if it is not changed
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Yinghai Lu <yinghai@kernel.org> writes:

> For 32bit mptable path, setup_ids_from_mpc() always write io apic id
> register, even there is no change needed.
>
> So try to do that when they are different bewteen reading out and
> mptable

What is the advantage of not writing the value?

Eric