From owner-cvs-all Wed Apr 28 12: 0:58 1999 Delivered-To: cvs-all@freebsd.org Received: from herring.nlsystems.com (nlsys.demon.co.uk [158.152.125.33]) by hub.freebsd.org (Postfix) with ESMTP id 17C861575C; Wed, 28 Apr 1999 12:00:45 -0700 (PDT) (envelope-from dfr@nlsystems.com) Received: from localhost (dfr@localhost) by herring.nlsystems.com (8.9.3/8.8.8) with ESMTP id UAA41346; Wed, 28 Apr 1999 20:01:20 +0100 (BST) (envelope-from dfr@nlsystems.com) Date: Wed, 28 Apr 1999 20:01:20 +0100 (BST) From: Doug Rabson To: Dmitrij Tejblum Cc: cvs-committers@freebsd.org, cvs-all@freebsd.org Subject: Re: cvs commit: src/sys/alpha/alpha pmap.c In-Reply-To: <199904281552.IAA34436@freefall.freebsd.org> Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-cvs-all@FreeBSD.ORG Precedence: bulk On Wed, 28 Apr 1999, Dmitrij Tejblum wrote: > dt 1999/04/28 08:52:11 PDT > > Modified files: > sys/alpha/alpha pmap.c > Log: > pmap_emulate_reference: don't ever lose PV_TABLE_MOD bit on page. If > PV_TABLE_REF cleared before PV_TABLE_MOD, the page may get fault on read again. > > On fault on write, pmap_emulate_reference mark the page dirty with > vm_page_dirty. That decrease ill effects of the bug. > > The problem probably become more serious after my rev.1.18 a week ago. Is this connected with the 'pv_table for %x is inconsistent' panic? I have seen this a couple of times recently but I haven't managed to debug it. -- Doug Rabson Mail: dfr@nlsystems.com Nonlinear Systems Ltd. Phone: +44 181 442 9037 To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe cvs-all" in the body of the message