Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Mon, 25 Feb 2002 11:33:11 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Mon, 25 Feb 2002 11:32:51 -0500 Received: from nat-pool-rdu.redhat.com ([66.187.233.200]:22946 "EHLO lacrosse.corp.redhat.com") by vger.kernel.org with ESMTP id ; Mon, 25 Feb 2002 11:32:46 -0500 Date: Mon, 25 Feb 2002 11:32:40 -0500 From: Benjamin LaHaise To: Alan Cox Cc: Linus Torvalds , Rusty Russell , mingo@elte.hu, Matthew Kirkwood , David Axmark , William Lee Irwin III , linux-kernel@vger.kernel.org Subject: Re: [PATCH] Lightweight userspace semaphores... Message-ID: <20020225113239.A11675@redhat.com> In-Reply-To:

Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.2.5.1i In-Reply-To: ; from alan@lxorguk.ukuu.org.uk on Mon, Feb 25, 2002 at 04:39:56PM +0000 Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Mon, Feb 25, 2002 at 04:39:56PM +0000, Alan Cox wrote: > _alloca > mmap > > Still fits on the stack 8) Are we sure that forcing semaphore overhead to the size of a page is a good idea? I'd much rather see a sleep/wakeup mechanism akin to wait queues be exported by the kernel so that userspace can implement a rich set of locking functions on top of that in whatever shared memory is being used. -ben - 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/