host crash - guest_4.o#sh_page_fault__guest
Guest tools should not be able to crash host - it will be treated as critical bug. Your stack is similar to that of reported earlier. And even though you have updated Xen version, the trigger could be something else...
FWIW, it appears that my fully patched 7.6 xcp host also rebooted the morning of 2/27
System Booted: 2019-02-27 04:46
I haven't dug into the logs yet.
Here the cpuidlestates.txt. Unsure how to get the BIOS settings without rebooting.
@r1 yes for sure.
Here: https://cloud.sinapto.net/index.php/s/0X8GdLxnTrw6bmd the output pf get-cpu-idle-states.
Power management is set up for maximun performance, power cap is disabled.
The system is a Dell poweredge r640.
Let me know if you need more details.
While digging on multiple things I'm curious on one patch
It seems to have been applied on
But its not there on
And I think this could have relation of the host crash mentioned above. The function
guest_walk_to_gfnis used in
stable-4.7but not at places mentioned by this specific patch.
Will try to find more on this, my tomorrow.
A quick update.
This morning we had another crash. Same host, same guest involved.
You can try this workaround: boot your host with the "pcid=0" parameter. This will likely have an impact on performance but should avoid the crash.
Security advisories have just been published on http://xenbits.xen.org/xsa/
The host crash you experienced is probably related to http://xenbits.xen.org/xsa/advisory-294.html
We will provide updated Xen packages as soon as they are ready.
Thank You for the update.