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
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20160713095005.GA27870@amd \
--to=pavel@ucw.cz \
--cc=len.brown@intel.com \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-pm@vger.kernel.org \
--cc=rjw@rjwysocki.net \
--cc=yu.c.chen@intel.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.