From mboxrd@z Thu Jan 1 00:00:00 1970 From: Peter Zijlstra Subject: Re: [linux-pm] [PATCH 0/8] Suspend block api (version 8) Date: Thu, 27 May 2010 19:26:56 +0200 Message-ID: <1274981216.27810.5605.camel@twins> References: <20100526142430.327ccbc4@schatten.dmk.lab> <20100526141612.3e2e0443@lxorguk.ukuu.org.uk> <20100527003943.07c17f85@lxorguk.ukuu.org.uk> <20100527140655.GA28048@srcf.ucam.org> <20100527155201.GA31937@srcf.ucam.org> <20100527165931.GB1062@srcf.ucam.org> <20100527172343.GB2468@srcf.ucam.org> Mime-Version: 1.0 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 8BIT Return-path: Received: from casper.infradead.org ([85.118.1.10]:38751 "EHLO casper.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1759341Ab0E0R1P convert rfc822-to-8bit (ORCPT ); Thu, 27 May 2010 13:27:15 -0400 In-Reply-To: <20100527172343.GB2468@srcf.ucam.org> Sender: linux-omap-owner@vger.kernel.org List-Id: linux-omap@vger.kernel.org To: Matthew Garrett Cc: Thomas Gleixner , Alan Cox , Arve =?ISO-8859-1?Q?Hj=F8nnev=E5g?= , Florian Mickler , Vitaly Wool , LKML , Paul@smtp1.linux-foundation.org, felipe.balbi@nokia.com, Linux OMAP Mailing List , Linux PM On Thu, 2010-05-27 at 18:23 +0100, Matthew Garrett wrote: > ACPI provides no guarantees about what level of hardware functionality > remains during S3. You don't have any useful ability to determine which > events will generate wakeups. And from a purely practical point of view, > since the latency is in the range of seconds, you'll never have a low > enough wakeup rate to hit it. If all of userspace is blocked on devices, WTH is keeping us from hitting it?