From owner-cvs-src@FreeBSD.ORG Mon May 29 14:09:18 2006 Return-Path: X-Original-To: cvs-src@freebsd.org Delivered-To: cvs-src@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 5024016A895; Mon, 29 May 2006 14:09:18 +0000 (UTC) (envelope-from bde@zeta.org.au) Received: from mailout1.pacific.net.au (mailout1.pacific.net.au [61.8.0.84]) by mx1.FreeBSD.org (Postfix) with ESMTP id 389D143D78; Mon, 29 May 2006 14:09:12 +0000 (GMT) (envelope-from bde@zeta.org.au) Received: from mailproxy2.pacific.net.au (mailproxy2.pacific.net.au [61.8.0.87]) by mailout1.pacific.net.au (Postfix) with ESMTP id 9B76C328719; Tue, 30 May 2006 00:09:11 +1000 (EST) Received: from katana.zip.com.au (katana.zip.com.au [61.8.7.246]) by mailproxy2.pacific.net.au (8.13.4/8.13.4/Debian-3sarge1) with ESMTP id k4TE99Sd019399; Tue, 30 May 2006 00:09:10 +1000 Date: Tue, 30 May 2006 00:09:10 +1000 (EST) From: Bruce Evans X-X-Sender: bde@delplex.bde.org To: David Xu In-Reply-To: <200605290719.49433.davidxu@freebsd.org> Message-ID: <20060530000449.A24521@delplex.bde.org> References: <200605280440.k4S4ej96064322@repoman.freebsd.org> <200605282006.26364.davidxu@freebsd.org> <20060528223012.H2592@epsplex.bde.org> <200605290719.49433.davidxu@freebsd.org> MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII; format=flowed Cc: cvs-src@freebsd.org, src-committers@freebsd.org, cvs-all@freebsd.org Subject: Re: cvs commit: src/sys/i386/isa npx.c X-BeenThere: cvs-src@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: CVS commit messages for the src tree List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 29 May 2006 14:09:27 -0000 On Mon, 29 May 2006, David Xu wrote: > On Sunday 28 May 2006 21:58, Bruce Evans wrote: > >> OK if it is correct to not copy the environment. >> > I will revert changes, I think I should keep it safe as before. Thanks. I couldn't find any more details about this using google. >> ... old CPUs (at least amd64 ones) that don't support mxcsr_mask >> also don't support DAZ, so the correct mask for them is 0xFFBF. These >> complications are implemented in Linux's i386 so I suppose they are >> no-ops at worst for non-amd64 CPUs. Linux stores the mask in a global >> variable. I think this breaks the asymmetric SMP case more than >> necessary. > process migrates from one CPU to another, I don't think you can use such > CPUs in same system if they are different in this case. Only actually using DAZ is sure not to work. > I haven't tried DAZ bit, will you fix it ? No, not in -current, sorry. I'll check your fix for it. Bruce