From: Pavel Machek <pavel@ucw.cz>
To: Chen Yu <yu.c.chen@intel.com>
Cc: linux-pm@vger.kernel.org, "Rafael J. Wysocki" <rjw@rjwysocki.net>,
Len Brown <len.brown@intel.com>,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH] PM / hibernate: Introduce snapshot test mode for hibernation
Date: Wed, 13 Jul 2016 11:50:05 +0200 [thread overview]
Message-ID: <20160713095005.GA27870@amd> (raw)
In-Reply-To: <1467873658-31986-1-git-send-email-yu.c.chen@intel.com>
On Thu 2016-07-07 14:40:58, Chen Yu wrote:
> This 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 BIOSen/bootloader,
> but also the system re-initialization.
>
> For example:
> $ sudo echo snapshot > /sys/power/disk
> $ sudo echo disk > /sys/power/state
>
> /* manual resume.*/
> $ sudo echo 8:3 > /sys/power/resume
Your examples will not work, will they?
This is also quite tricky/dangerous. If you do this with filesystems
mounted R/W, it is "good bye, filesystems".
I guess updating documentation would be welcome from my side,
otherwise it should be ok.
Acked-by: Pavel Machek <pavel@ucw.cz>
Best regards,
Pavel
--
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
next prev parent reply other threads:[~2016-07-13 9:50 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-07-07 6:40 [PATCH] PM / hibernate: Introduce snapshot test mode for hibernation Chen Yu
2016-07-13 9:50 ` Pavel Machek [this message]
2016-07-13 10:20 ` Chen Yu
2016-07-13 10:21 ` Pavel Machek
2016-07-13 10:39 ` Chen Yu
2016-07-13 17:01 ` Pavel Machek
2016-07-13 20:04 ` Rafael J. Wysocki
2016-07-13 20:26 ` Pavel Machek
2016-07-13 20:44 ` Rafael J. Wysocki
2016-07-13 21:45 ` Pavel Machek
2016-07-13 22:00 ` Rafael J. Wysocki
2016-07-13 22:18 ` Rafael J. Wysocki
2016-07-14 10:44 ` Chen Yu
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