Running xen 3.4.2 running with 15 vm (pv+hvm) on a host with 256 Gb RAM and 96 core CPU.
But recently my host crashed on debug log its showing
translating ffff83183fcb0000 with CR3 100ae42000 and 4 levels of page table.
after so many similar lines its showing
cannot translate address 0 < ffff830000000000 without cr3
From my understanding of xen pv is that,
hypervisor gives pv direct access to physical RAM
but hypervisor cross checks all the call to physical memory rather than using shadow pages.
So it has less overhead in virtual memory to physical conversion,as its aware about actual mapping and do it directly on physical ram.
But in case of HVM hypervisor needs to translate guests memory to physical ram.
So can anyone explain me from above translation that its for hvm ram translation hypervisor is doing or will it happen in pv also?