From owner-cvs-all  Mon Sep 20 13:24:53 1999
Delivered-To: cvs-all@freebsd.org
Received: from cs.rice.edu (cs.rice.edu [128.42.1.30])
	by hub.freebsd.org (Postfix) with ESMTP
	id 13F2D15002; Mon, 20 Sep 1999 13:24:44 -0700 (PDT)
	(envelope-from alc@cs.rice.edu)
Received: from nonpc.cs.rice.edu (nonpc.cs.rice.edu [128.42.1.219])
	by cs.rice.edu (8.9.0/8.9.0) with ESMTP id PAA05813;
	Mon, 20 Sep 1999 15:24:43 -0500 (CDT)
Received: (from alc@localhost) by nonpc.cs.rice.edu (8.9.3/8.7.3) id PAA01014; Mon, 20 Sep 1999 15:24:43 -0500 (CDT)
Date: Mon, 20 Sep 1999 15:24:43 -0500
From: Alan Cox <alc@cs.rice.edu>
To: Matt Dillon <dillon@freebsd.org>
Cc: cvs-committers@freebsd.org, cvs-all@freebsd.org
Subject: Re: cvs commit: src/sys/alpha/alpha vm_machdep.c src/sys/i386/i386 vm_machdep.c src/sys/kern sys_pipe.c src/sys/vm vm_extern.h
Message-ID: <19990920152443.A992@nonpc.cs.rice.edu>
References: <199909201908.MAA39566@freefall.freebsd.org>
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
X-Mailer: Mutt 0.95.1i
In-Reply-To: <199909201908.MAA39566@freefall.freebsd.org>; from Matt Dillon on Mon, Sep 20, 1999 at 12:08:49PM -0700
Sender: owner-cvs-all@FreeBSD.ORG
Precedence: bulk

This reminds me of the following: vm_fault_quick should be rewritten
so that the write case is atomic on SMPs, and not a read followed by
a write.  Currently, if another processor changed the location on which
vm_fault_quick is being performed between the read and the write, its
change would be lost.

Alan


To Unsubscribe: send mail to majordomo@FreeBSD.org
with "unsubscribe cvs-all" in the body of the message