linux-kernel - Re: [PATCH][v6] PM / hibernate: Introduce test

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Message-ID: <20160729082210.GA8125@sharon>
Date:	Fri, 29 Jul 2016 16:22:10 +0800
From:	Chen Yu <yu.c.chen@...el.com>
To:	Pavel Machek <pavel@....cz>
Cc:	Linux PM <linux-pm@...r.kernel.org>,
	"Rafael J. Wysocki" <rjw@...ysocki.net>,
	Len Brown <lenb@...nel.org>,
	Linux Kernel Mail List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH][v6] PM / hibernate: Introduce test_resume mode for
 hibernation

On Thu, Jul 28, 2016 at 09:32:06PM +0200, Pavel Machek wrote:
> On Fri 2016-07-22 10:30:47, Chen Yu wrote:
> > test_resume mode is to verify if the snapshot data
> > written to swap device can be successfully restored
> > to memory. It is useful to ease the debugging process
> > on hibernation, since this mode can not only bypass
> > the BIOSes/bootloader, but also the system re-initialization.
> > 
> > To avoid the risk to break the filesystm on persistent storage,
> > this patch resumes the image with tasks frozen.
> > 
> > For example:
> > echo test_resume > /sys/power/disk
> > echo disk > /sys/power/state
> > 
> > 
> > Suggested-by: Rafael J. Wysocki <rafael.j.wysocki@...el.com>
> > Signed-off-by: Chen Yu <yu.c.chen@...el.com>
> 
> Acked-by: Pavel Machek <pavel@....cz>
> 
> (And yes, I'd still like documentation patch for this, but that can be
> done in separate patch.)
>
Thanks! Will update the doc in another patch.
Yu