Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752580AbYHQMbH (ORCPT ); Sun, 17 Aug 2008 08:31:07 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752647AbYHQMaz (ORCPT ); Sun, 17 Aug 2008 08:30:55 -0400 Received: from saeurebad.de ([85.214.36.134]:37569 "EHLO saeurebad.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751693AbYHQMay (ORCPT ); Sun, 17 Aug 2008 08:30:54 -0400 From: Johannes Weiner To: Ingo Molnar Cc: Alexey Dobriyan , torvalds@osdl.org, akpm@osdl.org, linux-kernel@vger.kernel.org, Peter Zijlstra Subject: Re: [PATCH] De-macro spin_trylock_irq, spin_trylock_irqsave, write_trylock_irqsave References: <20080816095951.GA19926@martell.zuzino.mipt.ru> <20080816134600.GC20652@elte.hu> <20080816210439.GB5151@martell.zuzino.mipt.ru> <87pro8psk1.fsf@skyscraper.fehenstaub.lan> <20080817093114.GA21303@elte.hu> Date: Sun, 17 Aug 2008 14:30:30 +0200 In-Reply-To: <20080817093114.GA21303@elte.hu> (Ingo Molnar's message of "Sun, 17 Aug 2008 11:31:15 +0200") Message-ID: <871w0nygbd.fsf@skyscraper.fehenstaub.lan> User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/23.0.60 (gnu/linux) MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii X-Bogosity: Ham, tests=bogofilter, spamicity=0.000005, version=1.1.3 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1138 Lines: 30 Hi Ingo, Ingo Molnar writes: > * Johannes Weiner wrote: > >> >> (but it would also be hugely invasive, with not much upside with >> >> tons of downside like years of migration fallout and having to >> >> rewrite hundreds of kernel hacking books ;-) ) >> > >> > I want my money back for scheduler chapter from "Understanding the >> > Linux Kernel"! >> >> I agree that this argument of Ingo's is not a very good one... ;) > > i see the smiley, but still - there's a huge difference between the > "pain" caused by a much better scheduler [ hey, did you expect me to say > anything else? ;-) ] and a rather arbitrary value->pointer parametering > change to a core API that is used _everywhere_. I just meant the thing about the books. What you said about the invasive manner, the migration costs and the missing upside I fully agree with. Hannes -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/