From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752342AbXCFIUJ (ORCPT ); Tue, 6 Mar 2007 03:20:09 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752345AbXCFIUJ (ORCPT ); Tue, 6 Mar 2007 03:20:09 -0500 Received: from gprs189-60.eurotel.cz ([160.218.189.60]:36319 "EHLO amd.ucw.cz" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1752341AbXCFIUG (ORCPT ); Tue, 6 Mar 2007 03:20:06 -0500 Date: Tue, 6 Mar 2007 09:19:35 +0100 From: Pavel Machek To: Kirk Kuchov Cc: Davide Libenzi , Evgeniy Polyakov , Ingo Molnar , Eric Dumazet , Theodore Tso , Linus Torvalds , Ulrich Drepper , Linux Kernel Mailing List , Arjan van de Ven , Christoph Hellwig , Andrew Morton , Alan Cox , Zach Brown , "David S. Miller" , Suparna Bhattacharya , Jens Axboe , Thomas Gleixner Subject: Re: [patch 00/13] Syslets, "Threadlets", generic AIO support, v3 Message-ID: <20070306081935.GB2040@elf.ucw.cz> References: <20070302081047.GA27122@2ka.mipt.ru> <20070303100625.GA22557@2ka.mipt.ru> <20070303203140.GA756@2ka.mipt.ru> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: X-Warning: Reading this can be dangerous to your mental health. User-Agent: Mutt/1.5.11+cvs20060126 Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org > >As for why common abstractions like file are a good thing, think about why > >having "/dev/null" is cleaner that having a special plug DEVNULL_FD fd > >value to be plugged everywhere, > > This is a stupid comparaison. By your logic we should also have /dev/stdin, > /dev/stdout and /dev/stderr. Bzzt, wrong. We have them. pavel@amd:~$ ls -al /dev/std* lrwxrwxrwx 1 root root 4 Nov 12 2003 /dev/stderr -> fd/2 lrwxrwxrwx 1 root root 4 Nov 12 2003 /dev/stdin -> fd/0 lrwxrwxrwx 1 root root 4 Nov 12 2003 /dev/stdout -> fd/1 pavel@amd:~$ ls -al /proc/self/fd total 0 dr-x------ 2 pavel users 0 Mar 6 09:18 . dr-xr-xr-x 4 pavel users 0 Mar 6 09:18 .. lrwx------ 1 pavel users 64 Mar 6 09:18 0 -> /dev/ttyp2 lrwx------ 1 pavel users 64 Mar 6 09:18 1 -> /dev/ttyp2 lrwx------ 1 pavel users 64 Mar 6 09:18 2 -> /dev/ttyp2 lr-x------ 1 pavel users 64 Mar 6 09:18 3 -> /proc/2299/fd pavel@amd:~$ > >But here the list could be almost endless. > >And please don't start the, they don't scale or they need heavy file > >binding tossfeast. They scale as well as the interface that will receive > >them (poll, select, epoll). Heavy file binding what? 100 or so bytes for > >the struct file? How many signal/timer fd are you gonna have? Like 100K? > >Really moot argument when opposed to the benefit of being compatible with > >existing POSIX interfaces and being more Unix friendly. > > So why the HELL don't we have those yet? Why haven't you designed > epoll with those in mind? Why don't you back your claims with patches? > (I'm not a kernel developer.) Either stop flaming kernel developers or become one. It is that simple. Pavel -- (english) http://www.livejournal.com/~pavelmachek (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html