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| author | Li Zhijian | 2021-09-10 09:02:55 +0200 |
|---|---|---|
| committer | Juan Quintela | 2021-10-19 08:39:04 +0200 |
| commit | 911965ace9386e35ca022a65bb45a32fd421af3e (patch) | |
| tree | cac0f47717ae21a351c720847fedb41425a10263 /hw/virtio/vhost-user-rng-pci.c | |
| parent | migration/rdma: Try to register On-Demand Paging memory region (diff) | |
| download | qemu-911965ace9386e35ca022a65bb45a32fd421af3e.tar.gz qemu-911965ace9386e35ca022a65bb45a32fd421af3e.tar.xz qemu-911965ace9386e35ca022a65bb45a32fd421af3e.zip | |
migration/rdma: advise prefetch write for ODP region
The responder mr registering with ODP will sent RNR NAK back to
the requester in the face of the page fault.
---------
ibv_poll_cq wc.status=13 RNR retry counter exceeded!
ibv_poll_cq wrid=WRITE RDMA!
---------
ibv_advise_mr(3) helps to make pages present before the actual IO is
conducted so that the responder does page fault as little as possible.
Signed-off-by: Li Zhijian <lizhijian@cn.fujitsu.com>
Reviewed-by: Marcel Apfelbaum <marcel.apfelbaum@gmail.com>
Reviewed-by: Juan Quintela <quintela@redhat.com>
Signed-off-by: Juan Quintela <quintela@redhat.com>
Diffstat (limited to 'hw/virtio/vhost-user-rng-pci.c')
0 files changed, 0 insertions, 0 deletions