[Bug 208767] kernel stack overflow due to Lazy update IOAPIC on an x86_64 *host*, when gpu is passthrough to macos guest vm

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https://bugzilla.kernel.org/show_bug.cgi?id=208767

Alex Williamson (alex.williamson@xxxxxxxxxx) changed:

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                 CC|                            |alex.williamson@xxxxxxxxxx

--- Comment #7 from Alex Williamson (alex.williamson@xxxxxxxxxx) ---
(In reply to Paolo Bonzini from comment #1)
> This should have been fixed by commit
> 8be8f932e3db5fe4ed178b8892eeffeab530273a in Linux 5.7.

This is not fixed and it's not unique to a macos VM, a Linux guest can also
reproduce this.  I've seen this both during PXE boot and during shutdown with
certain NIC combinations (see rhbz1867373).  The only workaround is to disable
acpiv (kvm_intel.enable_apicv=0).  Any suggestions, Paolo?

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