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Message-ID: <86802c440809091554y349366fdu8e4ca59797ab4205@mail.gmail.com>
Date: Tue, 9 Sep 2008 15:54:16 -0700
From: "Yinghai Lu" <yhlu.kernel@gmail.com>
To: "Jeremy Fitzhardinge" <jeremy@goop.org>
Subject: Re: TARGET_CPUS in assign_irq_vector
Cc: "Eric W. Biederman" <ebiederm@xmission.com>, "Ingo Molnar" <mingo@elte.hu>,
       "Linux Kernel Mailing List" <linux-kernel@vger.kernel.org>
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On Tue, Sep 9, 2008 at 3:30 PM, Jeremy Fitzhardinge <jeremy@goop.org> wrote:
> On x86-64, the genapic implementations of target_cpus returns
> cpu_online_map.  What if more cpus have yet to come online?  Shouldn't
> it be cpu_possible_map?
>
> Though I'm probably confused.  I don't really know what the intent of
> target_cpus and vector_allocation_domain is.
>
logical mode, vector_allocation_domain will return all online cpus aka
the 8 cpus.

phys_flat mode, vector_allotcation_domain will only the cpumask with
the cpu set..

target_cpus is the cpus that could be possible to used to take vector
and process that irq. so at least it should be online.

YH