Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757646AbWKXIQV (ORCPT ); Fri, 24 Nov 2006 03:16:21 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1757642AbWKXIQV (ORCPT ); Fri, 24 Nov 2006 03:16:21 -0500 Received: from smtp.osdl.org ([65.172.181.25]:37092 "EHLO smtp.osdl.org") by vger.kernel.org with ESMTP id S1755791AbWKXIQU (ORCPT ); Fri, 24 Nov 2006 03:16:20 -0500 Date: Fri, 24 Nov 2006 00:14:12 -0800 From: Andrew Morton To: Eric Dumazet Cc: Ulrich Drepper , Jeff Garzik , Evgeniy Polyakov , David Miller , netdev , Zach Brown , Christoph Hellwig , Chase Venters , Johann Borck , linux-kernel@vger.kernel.org Subject: Re: [take25 1/6] kevent: Description. Message-Id: <20061124001412.371ec4e7.akpm@osdl.org> In-Reply-To: <45664160.6060504@cosmosbay.com> References: <11641265982190@2ka.mipt.ru> <456621AC.7000009@redhat.com> <45662522.9090101@garzik.org> <45663298.7000108@redhat.com> <45664160.6060504@cosmosbay.com> X-Mailer: Sylpheed version 2.2.7 (GTK+ 2.8.17; x86_64-unknown-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1170 Lines: 25 On Fri, 24 Nov 2006 01:48:32 +0100 Eric Dumazet wrote: > > The alternative is the sorry state we have now. In nscd, for instance, > > we have one single thread waiting for incoming connections and it then > > has to wake up a worker thread to handle the processing. This is done > > because we cannot "park" all threads in the accept() call since when a > > new connection is announced _all_ the threads are woken. With the new > > event handling this wouldn't be the case, one thread only is woken and > > we don't have to wake worker threads. All threads can be worker threads. > > Having one specialized thread handling the distribution of work to worker > threads is better most of the time. It might be now. Think "commodity 128-way". Your single distribution thread will run out of steam. What Ulrich is proposing is faster. This is a new interface. Let's design it to be fast. - 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/