Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1765502AbXIUVTq (ORCPT ); Fri, 21 Sep 2007 17:19:46 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1762946AbXIUVTj (ORCPT ); Fri, 21 Sep 2007 17:19:39 -0400 Received: from mx1.redhat.com ([66.187.233.31]:41957 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750981AbXIUVTi (ORCPT ); Fri, 21 Sep 2007 17:19:38 -0400 Date: Fri, 21 Sep 2007 17:19:35 -0400 From: Jakub Jelinek To: Andi Kleen Cc: patches@x86-64.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH] [20/45] x86_64: Use 8 byte stack alignment when possible Message-ID: <20070921211935.GW2625@devserv.devel.redhat.com> Reply-To: Jakub Jelinek References: <200709211044.901175000@suse.de> <20070921204502.2C61D14EFF@wotan.suse.de> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20070921204502.2C61D14EFF@wotan.suse.de> User-Agent: Mutt/1.4.1i Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 604 Lines: 15 On Fri, Sep 21, 2007 at 10:45:02PM +0200, Andi Kleen wrote: > > Kernel doesn't use SSE2, so it doesn't need 16 byte alignment. Also > the stack can be already unaligned so letting the compiler align > is useless. This may make some stack frames smaller. Shouldn't sources that are compiled into the VDSO or VSYSCALL pages revert this to the default? Jakub - 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/