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From: Jianyu Zhan <nasa4836@gmail.com>
Date: Sun, 13 Mar 2016 15:41:10 +0800
Message-ID: <CAHz2CGUF1tKGryb-S+obHuG98Ki6Lun5D55snuNDbpdudXbx0g@mail.gmail.com>
Subject: Re: [PATCH 3/3] x86/irq: update first_system_vector only when
 X86_LOCAL_PIC is on
To: Thomas Gleixner <tglx@linutronix.de>
Cc: mingo@redhat.com, "H. Peter Anvin" <hpa@zytor.com>,
        Aravind.Gopalakrishnan@amd.com, brgerst@gmail.com, bp@suse.de,
        feng.wu@intel.com, jiang.liu@linux.intel.com,
        Tejun Heo <tj@kernel.org>, dvlasenk@redhat.com, penberg@cs.helsinki.fi,
        Yinghai Lu <yhlu.kernel@gmail.com>, andi@firstfloor.org,
        Andy Lutomirski <luto@kernel.org>, ajm@sgi.com,
        Yinghai Lu <yinghai@kernel.org>, Akinobu Mita <akinobu.mita@gmail.com>,
        x86@kernel.org, LKML <linux-kernel@vger.kernel.org>
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On Sun, Mar 13, 2016 at 3:25 PM, Jianyu Zhan <nasa4836@gmail.com> wrote:
> My purpose of posting this patch set is trying to make the system vector layout
> reveal this fact.
>
> we have SMP system vector defined first( these may rely on or not rely
> on CONFIG_X86_LOCAL_APIC),
>
> then comes the CONFIG_X86_LOCAL_APIC dependent vector definition.
>
> then comes the rest vector definition that not only depends on
> CONFIG_X86_LOCAL_APIC, but
> also others(like MCE, virtualization).
>
> Among these stands out IRQ_WORK,   which neither depends on SMP nor
> CONFIG_X86_LOCAL_APIC.
>

My wording is incorrect,  should be like this:

The new system vector layout:

First, two special vector:  spurious and error.

Second, we have SMP system vector defined first( these implicitly
reply on CONFIG_X86_LOCAL_APIC),

Third, comes the CONFIG_X86_LOCAL_APIC dependent vector definition,
but not necessary
SMP dependent.( Among these stands out IRQ_WORK,   which neither
depends on SMP nor
CONFIG_X86_LOCAL_APIC.)

Finally,  comes the rest vector definition that not only depends on
CONFIG_X86_LOCAL_APIC, but
also others(like MCE, virtualization).





Regards,
Jianyu Zhan