From: "Dr. David Alan Gilbert" <dgilb...@redhat.com> Hyperv's synic (that we emulate) is a feature that allows the guest to place some magic (4k) pages of RAM anywhere it likes in GPA. This confuses vhost's RAM section merging when these pages land over the top of hugepages.
Since they're not normal RAM, and they shouldn't have vhost DMAing into them, exclude them from the vhost set. I do that by marking them as device-ram and then excluding device-ram from vhost. bz: https://bugzilla.redhat.com/show_bug.cgi?id=1779041 Dr. David Alan Gilbert (2): vhost: Don't pass ram device sections hyperv/synic: Allocate as ram_device hw/hyperv/hyperv.c | 14 ++++++++------ hw/virtio/vhost.c | 1 + 2 files changed, 9 insertions(+), 6 deletions(-) -- 2.24.1