On Wed, Sep 13, 2023 at 3:03 AM Lei Yang <leiyang@xxxxxxxxxx> 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. > Regards and thanks > Lei > > > On Tue, Sep 12, 2023 at 9:04 PM Dragos Tatulea <dtatulea@xxxxxxxxxx> 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@xxxxxxxxxx > > > > 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 > > >
