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Re: [Xen-devel] Direct Ethernet Connection Bug (3.0.4-1)

  • To: Timo Benk <timo.benk@xxxxxx>, Xen devel list <xen-devel@xxxxxxxxxxxxxxxxxxx>
  • From: Keir Fraser <Keir.Fraser@xxxxxxxxxxxx>
  • Date: Fri, 02 Feb 2007 15:22:32 +0000
  • Delivery-date: Fri, 02 Feb 2007 07:23:12 -0800
  • List-id: Xen developer discussion <xen-devel.lists.xensource.com>
  • Thread-index: AcdG3fVEM9Wi3rLREduKrQAX8io7RQ==
  • Thread-topic: [Xen-devel] Direct Ethernet Connection Bug (3.0.4-1)

On 2/2/07 11:53, "Timo Benk" <timo.benk@xxxxxx> wrote:

> If i start the Domain with the frontend-Device-Driver, i get the following
> log message inside the domain hosting the backend-device-driver:

Ability to map other guests' memory via grant tables is restricted to
domains that have some privilege to access I/o memory. This is because of
some unmap races in current grant-table code, allowing mapping domain to
theoretically use a stale mapping in its TLB for a very short time after
unmapping the foreign page.

So, this crash indicates that you have not given any I/O-memory access
privilege to the backend domain. Have you actually given it access to the
Ethernet PCI device and its I/O memory and I/O port resources?

 -- Keir

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