Si-Wei Liu
2023-Sep-15 06:34 UTC
[PATCH 00/16] vdpa: Add support for vq descriptor mappings
On 9/13/2023 9:08 AM, Eugenio Perez Martin wrote:> On Wed, Sep 13, 2023 at 3:03?AM Lei Yang <leiyang at redhat.com> wrote: >> Hi Dragos, Eugenio and Si-Wei >> >> My name is Lei Yang, a software Quality Engineer from Red Hat. And >> always paying attention to improving the live migration downtime >> issues because there are others QE asked about this problem when I >> share live migration status recently. Therefore I would like to test >> it in my environment. Before the testing I want to know if there is an >> expectation of downtime range based on this series of patches? In >> addition, QE also can help do a regression test based on this series >> of patches if there is a requirement. >> > Hi Lei, > > Thanks for offering the testing bandwidth! > > I think we can only do regression tests here, as the userland part is > still not sent to qemu.Right. Regression for now, even QEMU has it, to exercise the relevant feature it would need a supporting firmware that is not yet available for now. Just stay tuned. thanks for your patience, -Siwei> >> Regards and thanks >> Lei >> >> >> On Tue, Sep 12, 2023 at 9:04?PM Dragos Tatulea <dtatulea at nvidia.com> wrote: >>> This patch series adds support for vq descriptor table mappings which >>> are used to improve vdpa live migration downtime. The improvement comes >>> from using smaller mappings which take less time to create and destroy >>> in hw. >>> >>> The first part adds the vdpa core changes from Si-Wei [0]. >>> >>> The second part adds support in mlx5_vdpa: >>> - Refactor the mr code to be able to cleanly add descriptor mappings. >>> - Add hardware descriptor mr support. >>> - Properly update iotlb for cvq during ASID switch. >>> >>> [0] https://lore.kernel.org/virtualization/1694248959-13369-1-git-send-email-si-wei.liu at oracle.com >>> >>> Dragos Tatulea (13): >>> vdpa/mlx5: Create helper function for dma mappings >>> vdpa/mlx5: Decouple cvq iotlb handling from hw mapping code >>> vdpa/mlx5: Take cvq iotlb lock during refresh >>> vdpa/mlx5: Collapse "dvq" mr add/delete functions >>> vdpa/mlx5: Rename mr destroy functions >>> vdpa/mlx5: Allow creation/deletion of any given mr struct >>> vdpa/mlx5: Move mr mutex out of mr struct >>> vdpa/mlx5: Improve mr update flow >>> vdpa/mlx5: Introduce mr for vq descriptor >>> vdpa/mlx5: Enable hw support for vq descriptor mapping >>> vdpa/mlx5: Make iotlb helper functions more generic >>> vdpa/mlx5: Update cvq iotlb mapping on ASID change >>> Cover letter: vdpa/mlx5: Add support for vq descriptor mappings >>> >>> Si-Wei Liu (3): >>> vdpa: introduce dedicated descriptor group for virtqueue >>> vhost-vdpa: introduce descriptor group backend feature >>> vhost-vdpa: uAPI to get dedicated descriptor group id >>> >>> drivers/vdpa/mlx5/core/mlx5_vdpa.h | 31 +++-- >>> drivers/vdpa/mlx5/core/mr.c | 191 ++++++++++++++++------------- >>> drivers/vdpa/mlx5/core/resources.c | 6 +- >>> drivers/vdpa/mlx5/net/mlx5_vnet.c | 100 ++++++++++----- >>> drivers/vhost/vdpa.c | 27 ++++ >>> include/linux/mlx5/mlx5_ifc.h | 8 +- >>> include/linux/mlx5/mlx5_ifc_vdpa.h | 7 +- >>> include/linux/vdpa.h | 11 ++ >>> include/uapi/linux/vhost.h | 8 ++ >>> include/uapi/linux/vhost_types.h | 5 + >>> 10 files changed, 264 insertions(+), 130 deletions(-) >>> >>> -- >>> 2.41.0 >>>