When I start up a 32-bit PV guest with a pair of passthrough
NIC ports, I am seeing the following error:
(XEN) grant_table.c:1121:d1 Expanding dom (1) grant table
from (4) to (16) frames.
(XEN) mm.c:883:d1 Error getting mfn 212ef (pfn 1d210) from
L1 entry 00000000212ef023 for l1e_owner=1, pg_owner=1
(XEN) grant_table.c:266:d0 Bad flags (0) or dom (0). (expected
I am running the 64-bit linux-18.104.22.168 pvops kernel for
dom0 along with xen-unstable c/s 22068. This problem has been around for
quite a long time and was fixed in the OpenSuse11.1 release which had the
linux-2.6.27 kernel for dom0 paired with xen-3.4. In all of the
subsequent releases that I have tried, the problem has returned. A few
searches have shown that the problem has been observed by others, usually when
running 32-bit guests with passthrough NICs. In some instances the error
was observed when dom0 was mapping shared RX ring buffers.
Any ideas as to where something like this might be