Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751017AbWIMSNQ (ORCPT ); Wed, 13 Sep 2006 14:13:16 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751022AbWIMSNQ (ORCPT ); Wed, 13 Sep 2006 14:13:16 -0400 Received: from smtp105.mail.mud.yahoo.com ([209.191.85.215]:10633 "HELO smtp105.mail.mud.yahoo.com") by vger.kernel.org with SMTP id S1750999AbWIMSNP (ORCPT ); Wed, 13 Sep 2006 14:13:15 -0400 DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=s1024; d=yahoo.com.au; h=Received:Message-ID:Date:From:User-Agent:X-Accept-Language:MIME-Version:To:CC:Subject:References:In-Reply-To:Content-Type:Content-Transfer-Encoding; b=r3c4IkbFizfmtRFXsMsiu19jCNXz4LHilRCI5Yd44MaV4nIMTepXkcT10FFcPfPbHfOSt1sHbCXnsteS25AcKdHD9w7v1r8MnvqPKW4Vq7dYczZzF7PBfpkvBx47kSJNBQdpT6CK2xgkMpcmgCVLvpjj92BYPAaJ+wafYH6u21k= ; Message-ID: <45084A2C.8030804@yahoo.com.au> Date: Thu, 14 Sep 2006 04:13:00 +1000 From: Nick Piggin User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.7.12) Gecko/20051007 Debian/1.7.12-1 X-Accept-Language: en MIME-Version: 1.0 To: Christoph Lameter CC: David Howells , Arjan van de Ven , Dong Feng , ak@suse.de, Paul Mackerras , linux-kernel@vger.kernel.org, linux-arch@vger.kernel.org Subject: Re: Why Semaphore Hardware-Dependent? References: <44F395DE.10804@yahoo.com.au> <1156750249.3034.155.camel@laptopd505.fenrus.org> <11861.1156845927@warthog.cambridge.redhat.com> <45084833.4040602@yahoo.com.au> In-Reply-To: Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 939 Lines: 29 Christoph Lameter wrote: > On Thu, 14 Sep 2006, Nick Piggin wrote: > > >>Comments? > > > You only support 64k waiters. We have had cases of software failing > because more than 64k readers were waiting. Oh really? OK I figured if ppc64 was OK then that would be enough, but your large Altix systems did slip my mind. That is a fair criticism... atomic_long it will have to be, then. That will require a bit of atomic work to get atomic64_cmpxchg available on all 64-bit architectures. > Please sent patches inline in order for us to be able to comment. OK I will for next patchset. -- SUSE Labs, Novell Inc. Send instant messages to your online friends http://au.messenger.yahoo.com - 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/