From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756734Ab0EZQ73 (ORCPT ); Wed, 26 May 2010 12:59:29 -0400 Received: from ksp.mff.cuni.cz ([195.113.26.206]:52600 "EHLO atrey.karlin.mff.cuni.cz" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1754797Ab0EZQ71 (ORCPT ); Wed, 26 May 2010 12:59:27 -0400 Date: Wed, 26 May 2010 18:59:19 +0200 From: Pavel Machek To: Peter Zijlstra Cc: James Bottomley , Pekka Enberg , Arve Hj?nnev?g , Florian Mickler , "Rafael J. Wysocki" , Alan Stern , Dmitry Torokhov , Linux-pm mailing list , Kernel development list , Len Brown , Randy Dunlap , Andrew Morton , Andi Kleen , Cornelia Huck , Tejun Heo , Jesse Barnes , Nigel Cunningham , Ming Lei , Wu Fengguang , Maxim Levitsky , linux-doc@vger.kernel.org, Matthew Garrett , Greg KH , tytso@mit.edu Subject: Re: [PATCH 1/8] PM: Opportunistic suspend support. Message-ID: <20100526165919.GB2089@elf.ucw.cz> References: <1274863342.5882.4850.camel@twins> <20100526112303.3fef15a4@schatten.dmk.lab> <1274866402.5882.5051.camel@twins> <1274868384.5882.5169.camel@twins> <1274869262.5882.5222.camel@twins> <1274890736.4467.574.camel@mulgrave.site> <1274891308.1674.1766.camel@laptop> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1274891308.1674.1766.camel@laptop> X-Warning: Reading this can be dangerous to your mental health. User-Agent: Mutt/1.5.20 (2009-06-14) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed 2010-05-26 18:28:28, Peter Zijlstra wrote: > On Wed, 2010-05-26 at 11:18 -0500, James Bottomley wrote: > > > Or make the suspend manager a C proglet and provide a JNI interface, > > > or whatever. > > > > It's a fairly large piece of code to try to rewrite in C, so I don't > > think that's feasible on a reasonable timescale. Android does have the > > concept of special sockets that can be used to communicate from less to > > more privileged processes (it has a very segmented runtime model), so > > these might be usable ... they have a drawback that they're essentially > > named pipes, so no multiplexing, but one per suspend influencing C > > process shouldn't be a huge burden. > > It wouldn't need to convert the whole Frameworks layer into C, just > enough to manage the suspend state. > > Anyway, I think there's been enough arguments against even the concept > of opportunistic/auto-suspend, and I for one will object with a NAK if > Rafael send this to Linus. It was submitted already. I tried to followup with NAK, but can't currently see it in the archive. Pavel -- (english) http://www.livejournal.com/~pavelmachek (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html