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Date:   Thu, 20 Jul 2017 10:49:50 -0700
From:   Mark Salyzyn <salyzyn@...roid.com>
To:     "Rafael J. Wysocki" <rjw@...ysocki.net>,
        Linux PM <linux-pm@...r.kernel.org>
Cc:     LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2 2/3] PM / sleep: Mark suspend/hibernation start and
 finish

On 07/19/2017 06:38 PM, Rafael J. Wysocki wrote:
> From: Rafael J. Wysocki <rafael.j.wysocki@...el.com>
>
> Regardless of whether or not debug messages from the core system
> suspend/hibernation code are enabled, it is useful to know when
> system-wide transitions start and finish (or fail), so print "info"
> messages at these points.
>
> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@...el.com>
> ---
>
> -> v2: Smiplified the messages as suggested by Mark.
>
> ---
>   kernel/power/hibernate.c |    5 +++++
>   kernel/power/suspend.c   |    2 ++
>   2 files changed, 7 insertions(+)
>
> Index: linux-pm/kernel/power/hibernate.c
> ===================================================================
> --- linux-pm.orig/kernel/power/hibernate.c
> +++ linux-pm/kernel/power/hibernate.c
> @@ -692,6 +692,7 @@ int hibernate(void)
>   		goto Unlock;
>   	}
>   
> +	pr_info("hibernation entry\n");
nit (minor): Many of the logs report a PM: prefix. Flipping coin that 
the 3 characters provides any real gain is in your hands. My WAG is it 
would be nice to be able to do dmesg | grep PM:

Ack

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