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| author | David Hildenbrand | 2021-10-27 15:03:24 +0200 |
|---|---|---|
| committer | Michael S. Tsirkin | 2021-11-01 23:49:10 +0100 |
| commit | e1c1915befbd2a991b20812eef6ad650b5637a36 (patch) | |
| tree | 9cb3397f4e8f13c94874f0c72f3eacd6a257f58d /include | |
| parent | qtest: fix 'expression is always false' build failure in qtest_has_accel() (diff) | |
| download | qemu-e1c1915befbd2a991b20812eef6ad650b5637a36.tar.gz qemu-e1c1915befbd2a991b20812eef6ad650b5637a36.tar.xz qemu-e1c1915befbd2a991b20812eef6ad650b5637a36.zip | |
vhost-vdpa: Set discarding of RAM broken when initializing the backend
Similar to VFIO, vDPA will go ahead an map+pin all guest memory. Memory
that used to be discarded will get re-populated and if we
discard+re-access memory after mapping+pinning, the pages mapped into the
vDPA IOMMU will go out of sync with the actual pages mapped into the user
space page tables.
Set discarding of RAM broken such that:
- virtio-mem and vhost-vdpa run mutually exclusive
- virtio-balloon is inhibited and no memory discards will get issued
In the future, we might be able to support coordinated discarding of RAM
as used by virtio-mem and already supported by vfio via the
RamDiscardManager.
Acked-by: Jason Wang <jasowang@redhat.com>
Cc: Jason Wang <jasowang@redhat.com>
Cc: Michael S. Tsirkin <mst@redhat.com>
Cc: Cindy Lu <lulu@redhat.com>
Signed-off-by: David Hildenbrand <david@redhat.com>
Message-Id: <20211027130324.59791-1-david@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Stefano Garzarella <sgarzare@redhat.com>
Diffstat (limited to 'include')
0 files changed, 0 insertions, 0 deletions