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Date: Mon, 16 Aug 2010 17:09:11 +0100
From: Matthew Garrett <mjg59@srcf.ucam.org>
To: Arjan van de Ven <arjan@infradead.org>
Cc: paulmck@linux.vnet.ibm.com, Pavel Machek <pavel@ucw.cz>,
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Subject: Re: Attempted summary of suspend-blockers LKML thread, take three
Message-ID: <20100816160911.GA3479@srcf.ucam.org>
References: <20100811222854.GJ2516@linux.vnet.ibm.com> <AANLkTimahmGikeai8QnAxCy45deT00-6T7h-eA-NqL4G@mail.gmail.com> <20100812010612.GL2516@linux.vnet.ibm.com> <AANLkTinVV1NVHFPeO0p_e2pCtNwTNB932q9tbu9MMD3_@mail.gmail.com> <20100812034435.GA7403@linux.vnet.ibm.com> <20100813115751.3bbbafbd@lxorguk.ukuu.org.uk> <20100813152912.GE2511@linux.vnet.ibm.com> <20100814073843.GA27430@elf.ucw.cz> <20100814151048.GA2461@linux.vnet.ibm.com> <20100814095351.6a996187@infradead.org>
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On Sat, Aug 14, 2010 at 09:53:51AM -0700, Arjan van de Ven wrote:

> they tend to go "off".
> 
> however I think you're making an assumption that there is a
> real difference between a deep idle state and "off"....
> 
> For modern x86 hardware, that assumption isn't really valid.
> (other than a very very small sram that stores register content in the
> idle case)

Really? I thought the TSC stopped in suspend. Does having a package go 
into C6 mean that the RAM goes into self-refresh?

-- 
Matthew Garrett | mjg59@srcf.ucam.org
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