[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: [Xen-devel] Xen Crashes when releasing gnttab mappings - of a crashed domain.


  • To: "Moffie, Micha" <micha.moffie@xxxxxx>, Keir Fraser <keir@xxxxxxxxxxxxx>, xen-devel <xen-devel@xxxxxxxxxxxxxxxxxxx>
  • From: Keir Fraser <keir@xxxxxxxxxxxxx>
  • Date: Tue, 21 Nov 2006 16:09:11 +0000
  • Delivery-date: Tue, 21 Nov 2006 08:09:28 -0800
  • List-id: Xen developer discussion <xen-devel.lists.xensource.com>
  • Thread-index: AccNc31su++dBHlmEduJYgAX8io7RQAAhe0AAAEUTeEAArTeIAAAqekL
  • Thread-topic: [Xen-devel] Xen Crashes when releasing gnttab mappings - of a crashed domain.



On 21/11/06 15:52, "Moffie, Micha" <micha.moffie@xxxxxx> wrote:

> By why do you crash the local domain if the reference can not be
> ungranted?
> Is there no way to clean up? And if ld == 0?

This situation signals that the mapping domain cleared the granted mapping
by simply zapping the PTE, rather than going thru the explicit grant-unmap
operation. The effect of this is undefined (although of course it should not
crash Xen!) and for sanity's sake I prefer to crash the offender whenever I
can detect that this has happened.

 -- Keir


_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-devel


 


Rackspace

Lists.xenproject.org is hosted with RackSpace, monitoring our
servers 24x7x365 and backed by RackSpace's Fanatical Support®.