linux-kernel - Re: [PATCH 1/6] power: hibernate: Use separate messages for "Syncing filesystems"

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Message-ID: <5609150.OAJVFt04xE@vostro.rjw.lan>
Date:	Tue, 09 Jun 2015 01:35:24 +0200
From:	"Rafael J. Wysocki" <rjw@...ysocki.net>
To:	Joe Perches <joe@...ches.com>
Cc:	linux-pm@...r.kernel.org, Len Brown <len.brown@...el.com>,
	Pavel Machek <pavel@....cz>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/6] power: hibernate: Use separate messages for "Syncing filesystems"

On Thursday, June 04, 2015 11:36:44 AM Joe Perches wrote:
> Add the ability to see how long it takes to sync the filesystems
> via the printk time mechanism.
> 
> Start to standardize the printk "PM: doing something...done"
> messages on two separate lines.

Well, it would be good to say what problem this is attempting to fix.

And while I understand the underlying concern, there is a merit in keeping
each of these messages in one line (if everything goes well), so I'm wondering
what about printing each of them in one go after the operation with a tail
depending on the result?  Like

printk(KERN_INFO "PM: Syncing filesystems ... done\n");

on success or

printk(KERN_INFO "PM: Syncing filesystems ... failed\n");

on failure?


> Signed-off-by: Joe Perches <joe@...ches.com>
> ---
>  kernel/power/hibernate.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/kernel/power/hibernate.c b/kernel/power/hibernate.c
> index 2329daa..2466d78 100644
> --- a/kernel/power/hibernate.c
> +++ b/kernel/power/hibernate.c
> @@ -663,9 +663,9 @@ int hibernate(void)
>  	if (error)
>  		goto Exit;
>  
> -	printk(KERN_INFO "PM: Syncing filesystems ... ");
> +	printk(KERN_INFO "PM: Syncing filesystems ...\n");
>  	sys_sync();
> -	printk("done.\n");
> +	printk(KERN_INFO "PM: Syncing filesystems: done\n");
>  
>  	error = freeze_processes();
>  	if (error)
> 

-- 
I speak only for myself.
Rafael J. Wysocki, Intel Open Source Technology Center.
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