linux-kernel - Re: [linux-pm] [PATCH] hibernation should work ok with memory hotplug

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Message-ID: <Pine.LNX.4.44L0.0811060947250.2456-100000@iolanthe.rowland.org>
Date:	Thu, 6 Nov 2008 09:48:22 -0500 (EST)
From:	Alan Stern <stern@...land.harvard.edu>
To:	Nigel Cunningham <ncunningham@...a.org.au>
cc:	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>,
	Matt Tolentino <matthew.e.tolentino@...el.com>,
	<linux-pm@...ts.osdl.org>, Dave Hansen <haveblue@...ibm.com>,
	<linux-kernel@...r.kernel.org>,
	Dave Hansen <dave@...ux.vnet.ibm.com>, <linux-mm@...ck.org>,
	<pavel@...e.cz>, Mel Gorman <mel@...net.ie>,
	Andy Whitcroft <apw@...dowen.org>,
	Yasunori Goto <y-goto@...fujitsu.com>,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [linux-pm] [PATCH] hibernation should work ok with memory hotplug

On Thu, 6 Nov 2008, Nigel Cunningham wrote:

> Remember that when we hibernate (assuming we don't then suspend to ram),
> the power is fully off. Resuming starts off like a fresh boot.

That simply is not true.  On ACPI systems, hibernation goes into the S4 
state.  Power fully off is S5.

Alan Stern

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