From mboxrd@z Thu Jan 1 00:00:00 1970 From: Patrick Colp Subject: Re: xenpaging crashes xen in is_iomem_page() Date: Tue, 27 Jul 2010 14:39:47 -0400 Message-ID: References: <20100726115837.GA5643@aepfle.de> <20100727152045.GA20188@aepfle.de> <20100727182518.GA24532@aepfle.de> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Return-path: In-Reply-To: <20100727182518.GA24532@aepfle.de> List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Sender: xen-devel-bounces@lists.xensource.com Errors-To: xen-devel-bounces@lists.xensource.com To: Olaf Hering Cc: xen-devel@lists.xensource.com List-Id: xen-devel@lists.xenproject.org On 27 July 2010 14:25, Olaf Hering wrote: > On Tue, Jul 27, Patrick Colp wrote: > >> I pulled the latest version of Xen (revision 21859) and ran it on my >> EPT box and then ran xenpaging and it's working fine for me. > > Good to hear. > >> Have you tried paging more than just 1 page? Not sure why that should >> make a difference, but it's worth trying. Also, do you have any >> modifications/patches applied to your tree that aren't part of >> xen-unstable? Is the guest you're attempting to run xenpaging on an >> HVM guest? > > Other values lead to different crashes. I have no more modifications, > beside the submitted patches to runlevel scripts. > > Its not a HVM guest, I will try that right now. Ah, that would probably be why. Just to clarify, it only works for 64-bit Xen on HVM guests which are using EPT. > xenpaging has some pitfalls it seems. The lack of warning when trying to use xenpaging on non-EPT guests is an issue. I'm currently working on the fix. Patrick