linux-kernel - Re: [PATCH 2/4][RFC v2] PM / sleep: Introduce arch-specific hook for disable/enable nonboot cpus

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Message-ID: <20160625165159.GB4362@amd>
Date:	Sat, 25 Jun 2016 18:51:59 +0200
From:	Pavel Machek <pavel@....cz>
To:	Chen Yu <yu.c.chen@...el.com>
Cc:	linux-pm@...r.kernel.org, x86@...nel.org,
	"Rafael J. Wysocki" <rjw@...ysocki.net>,
	Len Brown <lenb@...nel.org>,
	Peter Zijlstra <peterz@...radead.org>,
	"H. Peter Anvin" <hpa@...or.com>, Borislav Petkov <bp@...e.de>,
	Brian Gerst <brgerst@...il.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...nel.org>,
	Varun Koyyalagunta <cpudebug@...ttech.com>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/4][RFC v2] PM / sleep: Introduce arch-specific hook for
 disable/enable nonboot cpus

On Sun 2016-06-26 00:18:41, Chen Yu wrote:
> There is requirement that we need to do some arch-specific
> operations before putting the nonboot CPUs offline/online.
> One of the requirements comes from the hibernation resume
> process on x86_64, we need to kick all the offlin-CPUs
> online and offline again, in order to put them in a safe
> state, thus to avoid possible unwilling wake up during
> hibernation resume.

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