From mboxrd@z Thu Jan  1 00:00:00 1970
From: Oliver Neukum <oneukum@suse.com>
Subject: Re: Should suspend plug low-level devices?
Date: Thu, 17 Mar 2016 08:50:28 +0100
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To: Jiri Kosina <jikos@kernel.org>
Cc: "Rafael J. Wysocki" <rafael@kernel.org>, Tejun Heo <tj@kernel.org>, Alan Stern <stern@rowland.harvard.edu>, Jan Kara <jack@suse.cz>, Peter Chen <hzpeterchen@gmail.com>, Florian Mickler <florian@mickler.org>, Linux-pm mailing list <linux-pm@vger.kernel.org>

On Thu, 2016-03-17 at 00:42 +0100, Jiri Kosina wrote:
> I am (slowly) working towards this goal. First I am trying to make
> sure 
> that all the kernel is using the kthread freezing API in a
> well-defined 
> way (which is currently not the case at all).
> 
> Before this is done, it is more or less impossible to analyse the
> current 
> users and make any decisions on top of that.
> 
> Once some kind of analysis is possible, I am pretty sure that we'll
> be 
> able to get rid of most kthread freezing by introducing fs freezing
> during 
> suspend (and fixing a lot of currently existing bugs as a nice 
> side-effect), and perhaps eventually ditch the kthread freezer
> altogether.

But what about character devices?

	Regards
		Oliver