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From: Ingo Molnar <mingo@kernel.org>
To: Fenghua Yu <fenghua.yu@intel.com>
Cc: H Peter Anvin <hpa@zytor.com>, Ingo Molnar <mingo@elte.hu>,
	Thomas Gleixner <tglx@linutronix.de>,
	linux-kernel <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH] x86/apic: Disable I/O APIC before shutdown local APIC
Date: Fri, 25 Oct 2013 12:57:42 +0200	[thread overview]
Message-ID: <20131025105742.GA5485@gmail.com> (raw)
In-Reply-To: <1382578212-4677-1-git-send-email-fenghua.yu@intel.com>


* Fenghua Yu <fenghua.yu@intel.com> wrote:

> From: Fenghua Yu <fenghua.yu@intel.com>
> 
> In reboot and crash path, when shutdown local APIC, I/O APIC is still active.
> This may cause issues because external interrupts can still come in and
> disturb local APIC during shutdown process. To quiet external interrupts,
> disable I/O APIC before shutdown local APIC.

What specific 'issues' were observed, on what kind of systems?

Thanks,

	Ingo

  reply	other threads:[~2013-10-25 10:57 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2013-10-24  1:30 [PATCH] x86/apic: Disable I/O APIC before shutdown local APIC Fenghua Yu
2013-10-25 10:57 ` Ingo Molnar [this message]
2013-11-06 22:32   ` Yu, Fenghua
2013-11-07 15:18 ` [tip:x86/apic] x86/apic: Disable I/ O APIC before shutdown of the " tip-bot for Fenghua Yu

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