From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751339AbVLKK7d (ORCPT ); Sun, 11 Dec 2005 05:59:33 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751342AbVLKK7d (ORCPT ); Sun, 11 Dec 2005 05:59:33 -0500 Received: from mx3.mail.elte.hu ([157.181.1.138]:18107 "EHLO mx3.mail.elte.hu") by vger.kernel.org with ESMTP id S1751339AbVLKK7c (ORCPT ); Sun, 11 Dec 2005 05:59:32 -0500 Date: Sun, 11 Dec 2005 11:58:44 +0100 From: Ingo Molnar To: Arjan van de Ven Cc: Gaurav Dhiman , yen , linux-kernel@vger.kernel.org Subject: Re: IRQ vector assignment for system call exception Message-ID: <20051211105844.GA4085@elte.hu> References: <20051208080435.M54890@eos.cs.nthu.edu.tw> <1e33f5710512100520k57c016b0tadfbb496cac3ea6e@mail.gmail.com> <1134238271.2828.19.camel@laptopd505.fenrus.org> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1134238271.2828.19.camel@laptopd505.fenrus.org> User-Agent: Mutt/1.4.2.1i X-ELTE-SpamScore: 0.0 X-ELTE-SpamLevel: X-ELTE-SpamCheck: no X-ELTE-SpamVersion: ELTE 2.0 X-ELTE-SpamCheck-Details: score=0.0 required=5.9 tests=AWL autolearn=no SpamAssassin version=3.0.3 0.0 AWL AWL: From: address is in the auto white-list X-ELTE-VirusStatus: clean Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org * Arjan van de Ven wrote: > On Sat, 2005-12-10 at 18:50 +0530, Gaurav Dhiman wrote: > > yes, definetely a historical reason. System libraries need to know > > this vector to invoke system call. > > nowadays it's also mostly unused; sysenter and friends are used > instead and they don't use this entry point. note that some system-calls are still invoked via int80 by glibc, such as fork() - even on sysenter/syscall capable CPUs. Ingo