linux-kernel - Re: [RFC 4/5] x86, Use NMI return notifier in MCE

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Date:	Thu, 24 Jun 2010 12:00:34 +0200
From:	Andi Kleen <andi@...stfloor.org>
To:	Huang Ying <ying.huang@...el.com>
Cc:	Ingo Molnar <mingo@...e.hu>, "H. Peter Anvin" <hpa@...or.com>,
	linux-kernel@...r.kernel.org, Peter Zijlstra <peterz@...radead.org>
Subject: Re: [RFC 4/5] x86, Use NMI return notifier in MCE

Huang Ying <ying.huang@...el.com> writes:

Hi Ying,

>  {
>  	if (regs->flags & (X86_VM_MASK|X86_EFLAGS_IF)) {
> -		mce_notify_irq();
> -		/*
> -		 * Triggering the work queue here is just an insurance
> -		 * policy in case the syscall exit notify handler
> -		 * doesn't run soon enough or ends up running on the
> -		 * wrong CPU (can happen when audit sleeps)
> -		 */
> -		mce_schedule_work();
> +		__mce_report_event(NULL);

Do we still handle the CPU switch case correctly?

The backend handler needs to run on the same CPU to process the per
CPU mce pfns.

-Andi

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