From: Jan Kiszka <jan.kiszka@siemens.com>
To: Andi Kleen <andi@firstfloor.org>
Cc: Ingo Molnar <mingo@kernel.org>, 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: [PATCH] x86: Plug racy xAPIC access of CPU hotplug code
Date: Wed, 29 Jan 2014 09:11:28 +0100 [thread overview]
Message-ID: <52E8B7B0.8050803@siemens.com> (raw)
In-Reply-To: <20140128211702.GB11821@two.firstfloor.org>
On 2014-01-28 22:17, Andi Kleen wrote:
> Also with irq-off you of course still always have races against
> the NMI-level machine check.
The self-IPI triggered over NMI won't touch the high-part of the ICR and
will properly wait for ICR to become free again. So we are safe.
Jan
--
Siemens AG, Corporate Technology, CT RTC ITP SES-DE
Corporate Competence Center Embedded Linux
next prev parent reply other threads:[~2014-01-29 8:12 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-01-27 19:14 [PATCH] x86: Plug racy xAPIC access of CPU hotplug code Jan Kiszka
2014-01-27 20:22 ` Andi Kleen
2014-01-28 8:18 ` Jan Kiszka
2014-01-28 11:55 ` Ingo Molnar
2014-01-28 12:09 ` Jan Kiszka
2014-01-28 21:17 ` Andi Kleen
2014-01-29 8:11 ` Jan Kiszka [this message]
2014-02-16 9:02 ` Jan Kiszka
2014-03-06 17:51 ` Igor Mammedov
2014-03-11 12:39 ` [tip:x86/apic] x86/apic: " tip-bot for Jan Kiszka
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