On Wed, Apr 07, 2021 at 07:26:41AM -0400, Dave Voutila wrote: > > Mike Larkin writes: > > > On Wed, Apr 07, 2021 at 12:22:23AM +0200, Thomas L. wrote: > >> On Tue, 6 Apr 2021 14:28:09 -0700 > >> Mike Larkin <[email protected]> wrote: > >> > >> > On Tue, Apr 06, 2021 at 09:15:10PM +0200, Thomas L. wrote: > >> > > On Tue, 6 Apr 2021 11:11:01 -0700 > >> > > Mike Larkin <[email protected]> wrote: > >> > > > Anything in the host's dmesg? > >> > > > >> > > >> > *host* dmesg. I think you misread what I was after... > >> > >> The dmesg of the host was already attached to the first mail below the > >> vm.conf (I mistakenly called the host hypervisor, which I realize now is > >> not accurate). I figured since it was already attached, that > >> you must mean the VM, compounding the confusion ... > >> > >> Kind regards, > >> > >> Thomas > >> > > > > I see. > > > > You'll probably need to build a kernel with VMM_DEBUG and save that output > > and > > send it to me once a VM crashes. Note: it will generate a lot of output and > > probably make things somewhat slower. > > > > -ml > > Thomas: I looked at your host dmesg and your provided vm.conf. It looks > like 11 vm's with the default 512M memory and one (minecraft) with > 8G. Your host seems to have only 16GB of memory, some of which is > probably unavailable as it's used by the integrated gpu. I'm wondering > if you are effectively oversusbcribing your memory here. > > I know we currently don't support swapping guest memory out, but not > sure what happens if we don't have the physical memory to fault a page > in and wire it. >
Something else gets swapped out. > Even without a custom kernel with VMM_DEBUG, if it's a uvm_fault issue > you should see a message in the kernel buffer. Something like: > > vmx_fault_page: uvm_fault returns N, GPA=0x...., rip=0x.... > > mlarkin: thoughts on my hypothesis? Am I wildly off course? > > -dv > Yeah I was trying to catch the big dump when a VM resets. That would tell us if the vm caused the reset or if vmd(8) crashed for some reason.
