From: "Rafael J. Wysocki" <rjw@sisk.pl>
To: linux-pm@lists.linux-foundation.org
Subject: Re: Question about hibernation
Date: Wed, 6 Oct 2010 00:43:30 +0200 [thread overview]
Message-ID: <201010060043.30489.rjw@sisk.pl> (raw)
In-Reply-To: <BLU102-W27AEE84EC4B31E9F85FF13EB6D0@phx.gbl>
On Tuesday, October 05, 2010, Raj Kumar wrote:
>
> Hi Alan,
>
> I have question regarding the hibernation mode in linux.
>
> 1) In normal suspend to ram, is freezing of tasks necessary while suspend to ram in current linux power management core?
Yes, it is.
> 2) In hibernation mode, is freezing of tasks done before normal suspend/resumes in order to that hibernation image is in sync?
That depends on what you mean by normal "suspend/resumes". Generally speaking,
the hibernate code freezes tasks before preallocating image memory.
> My issue is because it might be possible that there is some part of device driver which is user space and another part is kernel space
> then in suspend to ram and hibernation mode is freezing of all user space part is done before kernel side or it differs while
> suspend to ram and hibernation mode?
User space is always frozen before suspend and hibernation.
Thanks,
Rafael
next prev parent reply other threads:[~2010-10-05 22:43 UTC|newest]
Thread overview: 33+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-08-23 19:17 Runtime PM and the block layer Alan Stern
2010-08-23 19:53 ` Jens Axboe
2010-08-23 21:51 ` Alan Stern
2010-08-24 13:15 ` Runtime power management during system resume Raj Kumar
2010-08-24 14:30 ` Alan Stern
2010-08-24 15:17 ` Raj Kumar
2010-08-24 17:50 ` Alan Stern
2010-08-25 13:27 ` Raj Kumar
2010-08-25 14:51 ` Alan Stern
2010-08-26 13:40 ` Raj Kumar
2010-08-26 14:33 ` Alan Stern
2010-09-18 11:49 ` (no subject) Raj Kumar
2010-09-18 15:36 ` your mail Alan Stern
2010-09-18 15:56 ` Dominik Brodowski
2010-10-05 21:40 ` Question about hibernation Raj Kumar
2010-10-05 22:43 ` Rafael J. Wysocki [this message]
2010-08-24 13:38 ` Runtime PM and the block layer Jens Axboe
2010-08-24 14:42 ` Alan Stern
2010-08-24 17:09 ` Jens Axboe
2010-08-24 20:06 ` Alan Stern
2010-08-24 20:10 ` Jens Axboe
2010-08-24 21:09 ` Alan Stern
2010-09-27 15:22 ` Alan Stern
2010-08-30 16:32 ` Alan Stern
[not found] <mailman.23.1286318684.6175.linux-pm@lists.linux-foundation.org>
2010-10-08 10:32 ` Question about hibernation Raj Kumar
2010-10-08 19:31 ` Rafael J. Wysocki
2010-10-14 8:20 ` Raj Kumar
2010-10-14 9:51 ` Rafael J. Wysocki
2010-10-14 11:47 ` Raj Kumar
2010-10-14 18:59 ` Rafael J. Wysocki
2011-01-04 21:14 Question about timers during system suspend Raj Kumar
2011-01-04 23:05 ` Rafael J. Wysocki
2011-01-04 23:57 ` Raj Kumar
2011-01-05 8:27 ` Rafael J. Wysocki
2011-03-18 13:45 ` Question about hibernation Raj Kumar
2011-03-18 14:09 ` Oliver Neukum
2011-03-19 23:47 ` Raj Kumar
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