Date: Wed, 22 Jan 2014 19:43:25 +0100
From: Andi Kleen <andi@firstfloor.org>
To: Huang Ying <ying.huang@intel.com>
Cc: Andi Kleen <andi@firstfloor.org>, Peter Zijlstra <peterz@infradead.org>,
        Jan Kiszka <jan.kiszka@siemens.com>, Ingo Molnar <mingo@elte.hu>,
        Thomas Gleixner <tglx@linutronix.de>, "H. Peter Anvin" <hpa@zytor.com>,
        Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: x86: Inconsistent xAPIC synchronization in arch_irq_work_raise?
Message-ID: <20140122184325.GY20765@two.firstfloor.org>
References: <52DE6FCE.2050708@siemens.com>
 <20140121140113.GL30183@twins.programming.kicks-ass.net>
 <20140121145105.GE3694@twins.programming.kicks-ass.net>
 <1390346420.23634.5.camel@yhuang-dev>
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> > Huang Ying, can you explain to Jan why you do the wait afterwards?
> 
> I borrow the code from the original MCE report event code.
> 
> Andi, could you help us to explain it?

I don't recall all the details, but I believe i also just copied 
it from the APIC code. I don't think I did any particular ordering
intentionally.

-Andi

-- 
ak@linux.intel.com -- Speaking for myself only.
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