linux-kernel - Re: x86: Inconsistent xAPIC synchronization in arch_irq_work

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Date:	Thu, 23 Jan 2014 21:17:51 +0100
From:	Andi Kleen <andi@...stfloor.org>
To:	Jan Kiszka <jan.kiszka@...mens.com>
Cc:	Andi Kleen <andi@...stfloor.org>,
	Huang Ying <ying.huang@...el.com>,
	Peter Zijlstra <peterz@...radead.org>,
	Ingo Molnar <mingo@...e.hu>,
	Thomas Gleixner <tglx@...utronix.de>,
	"H. Peter Anvin" <hpa@...or.com>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: x86: Inconsistent xAPIC synchronization in arch_irq_work_raise?

> > It has to be lockless, the machine checks run as NMIs.
> > The whole point of the self nmi is to get back to a lockable state.
> 
> "It" is arch_irq_work_raise, or more?

Really irq_work_queue, but it boils down to arch_irq_work_raise

-Andi
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