From mboxrd@z Thu Jan 1 00:00:00 1970 From: Keir Fraser Subject: Re: [PATCH] x86/PAE partially linear page table support Date: Thu, 15 Feb 2007 10:25:47 +0000 Message-ID: References: <45D438F3.76E4.0078.0@novell.com> Mime-Version: 1.0 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <45D438F3.76E4.0078.0@novell.com> List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Sender: xen-devel-bounces@lists.xensource.com Errors-To: xen-devel-bounces@lists.xensource.com To: Jan Beulich , xen-devel@lists.xensource.com List-Id: xen-devel@lists.xenproject.org How do you ensure that circular references are correctly cleaned up at domain destruction time? (i.e., A references B and B references A). We have special destructore code to clean up all root pagetable references, but the code isn't there for lower levels. -- Keir On 15/2/07 09:41, "Jan Beulich" wrote: > While full linear page table support makes little sense (and would be more > complicated to implement), partial linear page table support is almost > identical > to that in non-PAE, and is used (at least) by NetWare. > > Of course, the question here is whether this shouldn't be generalized - all > validated page tables (except for top level PAE) could be allowed to be > installed > at lower levels using the same scheme. > > Signed-off-by: Jan Beulich