Gerd Hoffmann wrote:
Log attached. Scanning it and having a brief look at the source code
makes me suspect it could be a flags update triggering this: Due to
64bit xen guest kernels running in ring3 xenner may just flip the user
bit (off->on) in the page table handler, which is a unusual operation I
guess ...
The unshadow-on-userspace-access heuristic is broken. Since it is also
bad for Xenner, try removing the following lines:
spte |= PT_WRITABLE_MASK;
if (user_fault) {
mmu_unshadow(vcpu->kvm, gfn);
goto unshadowed;
}
--
Do not meddle in the internals of kernels, for they are subtle and quick to
panic.
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