From mboxrd@z Thu Jan 1 00:00:00 1970 Subject: Re: [linux-pm] [PATCH] hibernation should work ok with memory hotplug From: Nigel Cunningham In-Reply-To: References: Content-Type: text/plain Date: Fri, 07 Nov 2008 07:46:46 +1100 Message-Id: <1226004406.6876.5.camel@nigel-laptop> Mime-Version: 1.0 Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org Return-Path: To: Alan Stern Cc: KAMEZAWA Hiroyuki , Matt Tolentino , linux-pm@lists.osdl.org, Dave Hansen , linux-kernel@vger.kernel.org, Dave Hansen , linux-mm@kvack.org, pavel@suse.cz, Mel Gorman , Andy Whitcroft , Yasunori Goto , Andrew Morton List-ID: Hi. On Thu, 2008-11-06 at 09:48 -0500, Alan Stern wrote: > 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. For the purposes of our discussion, it was a good enough description. Nevertheless, you're right - if we do everything in a fully ACPI spec compliant way, there will still be some power around. Of course we don't always do that (can use S4 or S5). Regards, Nigel -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org