Comment 2 for bug 1538049

For the recent crashes the pointer seemed always consistent with previous mappings. Wondering whether the mapping might be invalidated by the hypervisor side. For additional information, when I start the domU, grant table debug shows the following at the beginning:

(XEN) grant-table for remote domain: 1 (v1)
(XEN) [ 0] 0 0x212992 0x00000002 0 0x212992 0x19
(XEN) [ 1] 0 0x212991 0x00000002 0 0x212991 0x19
(XEN) [ 8] 0 0x1d26b7 0x00000001 0 0x1d26b7 0x19

when xenstored crashes, the middle entry goes away. But its impossible to say whether it goes away before the crash or just as a result of it.