linux-kernel - Re: question on resume()

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Message-Id: <200701291234.59706.oliver@neukum.name>
Date:	Mon, 29 Jan 2007 12:34:58 +0100 (MET)
From:	Oliver Neukum <oliver@...kum.name>
To:	nigel@...el.suspend2.net
Cc:	linux-kernel@...r.kernel.org
Subject: Re: question on resume()

Am Montag, 29. Januar 2007 12:24 schrieb Nigel Cunningham:
> Hi.
> 
> On Mon, 2007-01-29 at 12:06 +0100, Oliver Neukum wrote:
> > Hi,
> > 
> > may a driver call wake_up() while doing resume() ?
> 
> I assume you mean waking a userspace process from drivers_resume(). If
> so, the answer is no - processes will still be frozen at the point. In
> the case of Suspend2, the LRU pages will still not have been read
> either, so Suspend2 users would hate you for making hibernation crash
> and burn :)

If so, how do I notify tasks presumably about to be thawed that their
IO failed?

	Regards
		Oliver
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