linux-kernel - Re: [PATCH v1] PM / sleep: make pm notifier called symmetrically

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Message-ID: <CAJZ5v0hT8B9k44V3KFbJPev0ORyVD2MiE=0nn8O_qdaU=QkHXg@mail.gmail.com>
Date:	Wed, 18 May 2016 22:34:02 +0200
From:	"Rafael J. Wysocki" <rafael@...nel.org>
To:	Lianwei Wang <lianwei.wang@...il.com>
Cc:	Thomas Gleixner <tglx@...utronix.de>,
	Peter Zijlstra <peterz@...radead.org>,
	Ingo Molnar <mingo@...nel.org>,
	Oleg Nesterov <oleg@...hat.com>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	"linux-pm@...r.kernel.org" <linux-pm@...r.kernel.org>
Subject: Re: [PATCH v1] PM / sleep: make pm notifier called symmetrically

On Wed, May 18, 2016 at 8:07 AM, Lianwei Wang <lianwei.wang@...il.com> wrote:
> This makes pm notifier PREPARE/POST symmetrical: if PREPARE
> fails, we will only undo what ever happened on PREPARE.
>
> It fixes the unbalanced cpu hotplug enable in cpu pm notifier.

Can you please describe the problem you're trying to address in a bit
more detail?