Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S262521AbVDGQrw (ORCPT ); Thu, 7 Apr 2005 12:47:52 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S262522AbVDGQrw (ORCPT ); Thu, 7 Apr 2005 12:47:52 -0400 Received: from mx1.redhat.com ([66.187.233.31]:41101 "EHLO mx1.redhat.com") by vger.kernel.org with ESMTP id S262521AbVDGQrn (ORCPT ); Thu, 7 Apr 2005 12:47:43 -0400 Date: Thu, 7 Apr 2005 12:47:34 -0400 From: Dave Jones To: Linus Torvalds Cc: Andrew Morton , Ingo Molnar , stsp@aknet.ru, linux-kernel@vger.kernel.org, VANDROVE@vc.cvut.cz Subject: Re: crash in entry.S restore_all, 2.6.12-rc2, x86, PAGEALLOC Message-ID: <20050407164734.GB19016@redhat.com> Mail-Followup-To: Dave Jones , Linus Torvalds , Andrew Morton , Ingo Molnar , stsp@aknet.ru, linux-kernel@vger.kernel.org, VANDROVE@vc.cvut.cz References: <20050405065544.GA21360@elte.hu> <4252E2C9.9040809@aknet.ru> <4252EA01.7000805@aknet.ru> <425403F6.409@aknet.ru> <20050407080004.GA27252@elte.hu> <20050407041006.4c9db8b2.akpm@osdl.org> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.4.1i Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 636 Lines: 23 On Thu, Apr 07, 2005 at 07:47:41AM -0700, Linus Torvalds wrote: > So the sysenter sequence might as well look like > > pushl $(__USER_DS) > pushl %ebp > sti > pushfl > .. > > which actually does three protected pushes thanks to the one-instruction > "interrupt shadow" after an sti. Is this guaranteed on every x86 variant (or rather, every one that has SEP). ? Dave - 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/