From owner-cvs-src@FreeBSD.ORG  Mon May 19 19:52:42 2003
Return-Path: <owner-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 6432D37B401; Mon, 19 May 2003 19:52:42 -0700 (PDT)
Received: from repoman.freebsd.org (repoman.freebsd.org [216.136.204.115])
	by mx1.FreeBSD.org (Postfix) with ESMTP
	id 1729343F85; Mon, 19 May 2003 19:52:42 -0700 (PDT)
	(envelope-from marcel@FreeBSD.org)
Received: from repoman.freebsd.org (localhost [127.0.0.1])
	by repoman.freebsd.org (8.12.6/8.12.6) with ESMTP id h4K2qf0U059718;
	Mon, 19 May 2003 19:52:41 -0700 (PDT)
	(envelope-from marcel@repoman.freebsd.org)
Received: (from marcel@localhost)
	by repoman.freebsd.org (8.12.6/8.12.6/Submit) id h4K2qfom059717;
	Mon, 19 May 2003 19:52:41 -0700 (PDT)
Message-Id: <200305200252.h4K2qfom059717@repoman.freebsd.org>
From: Marcel Moolenaar <marcel@FreeBSD.org>
Date: Mon, 19 May 2003 19:52:41 -0700 (PDT)
To: src-committers@FreeBSD.org, cvs-src@FreeBSD.org,
	cvs-all@FreeBSD.org
X-FreeBSD-CVS-Branch: HEAD
Subject: cvs commit: src/sys/ia64/ia64 pmap.c
X-BeenThere: cvs-src@freebsd.org
X-Mailman-Version: 2.1.1
Precedence: list
List-Id: CVS commit messages for the src tree <cvs-src.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/cvs-src>,
	<mailto:cvs-src-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/cvs-src>
List-Post: <mailto:cvs-src@freebsd.org>
List-Help: <mailto:cvs-src-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/cvs-src>,
	<mailto:cvs-src-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Tue, 20 May 2003 02:52:42 -0000

marcel      2003/05/19 19:52:41 PDT

  FreeBSD src repository

  Modified files:
    sys/ia64/ia64        pmap.c 
  Log:
  Prevent corruption of the VHPT collision chain by protecting it with
  a mutex. The only volatile chain operations are insertion and deletion
  but since updating an existing PTE also updates the VHPT entry itself,
  and we have the VHPT mutex in both other cases, we also lock when we
  update an existing PTE even though no chain operation is involved.
  Note that we perform the insertion and deletion careful enough that
  we don't need to lock traversals. If we need to lock traversals, we
  also need to lock from the exception handler, which we can't without
  creating a trapframe.
  
  We're now able to withstand a -j8 buildworld. More work is needed to
  withstand Murphy fields. In other words: we still have a bogon...
  
  Approved by: re@ (blanket)
  
  Revision  Changes    Path
  1.106     +43 -45    src/sys/ia64/ia64/pmap.c