[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
RE: [RFC PATCH 0/3] vfio/migration: Support manual clear vfio dirty log
From: |
Tian, Kevin |
Subject: |
RE: [RFC PATCH 0/3] vfio/migration: Support manual clear vfio dirty log |
Date: |
Thu, 18 Mar 2021 06:28:02 +0000 |
> From: Kunkun Jiang
> Sent: Wednesday, March 10, 2021 5:41 PM
>
> Hi all,
>
> In the past, we clear dirty log immediately after sync dirty log to
> userspace. This may cause redundant dirty handling if userspace
> handles dirty log iteratively:
>
> After vfio clears dirty log, new dirty log starts to generate. These
> new dirty log will be reported to userspace even if they are generated
> before userspace handles the same dirty page.
>
> Since a new dirty log tracking method for vfio based on iommu hwdbm[1]
> has been introduced in the kernel and added a new capability named
> VFIO_DIRTY_LOG_MANUAL_CLEAR, we can eliminate some redundant dirty
> handling by supporting it.
Is there any performance data showing the benefit of this new method?
>
> This series include patches as below:
> Patch 1:
> - updated the linux-headers/linux/vfio.h from kernel side
>
> Patch 2:
> - introduced 'struct VFIODMARange' to describe a range of the given DMA
> mapping and with respect to a VFIO_IOMMU_MAP_DMA operation
>
> Patch 3:
> - implemented the operation to manual clear vfio dirty log, which can
> eliminate some redundant dirty handling
>
> Thanks,
> Kunkun Jiang
>
> [1] https://lore.kernel.org/linux-iommu/20210310090614.26668-1-
> zhukeqian1@huawei.com/T/#mb168c9738ecd3d8794e2da14f970545d5820f
> 863
>
> Zenghui Yu (3):
> linux-headers: update against 5.12-rc2 and "vfio log clear" series
> vfio: Maintain DMA mapping range for the container
> vfio/migration: Support VFIO_IOMMU_DIRTY_PAGES_FLAG_CLEAR_BITMAP
>
> hw/vfio/common.c | 207 ++++++++++++++++++++++++++++++++--
> include/hw/vfio/vfio-common.h | 10 ++
> linux-headers/linux/vfio.h | 55 ++++++++-
> 3 files changed, 264 insertions(+), 8 deletions(-)
>
> --
> 2.23.0
>
- [RFC PATCH 0/3] vfio/migration: Support manual clear vfio dirty log, Kunkun Jiang, 2021/03/10
- [RFC PATCH 1/3] linux-headers: update against 5.12-rc2 and "vfio log clear" series, Kunkun Jiang, 2021/03/10
- [RFC PATCH 2/3] vfio: Maintain DMA mapping range for the container, Kunkun Jiang, 2021/03/10
- [RFC PATCH 3/3] vfio/migration: Support VFIO_IOMMU_DIRTY_PAGES_FLAG_CLEAR_BITMAP, Kunkun Jiang, 2021/03/10
- Re: [RFC PATCH 0/3] vfio/migration: Support manual clear vfio dirty log, Kunkun Jiang, 2021/03/18
- RE: [RFC PATCH 0/3] vfio/migration: Support manual clear vfio dirty log,
Tian, Kevin <=
- Re: [RFC PATCH 0/3] vfio/migration: Support manual clear vfio dirty log, Kunkun Jiang, 2021/03/18
- RE: [RFC PATCH 0/3] vfio/migration: Support manual clear vfio dirty log, Tian, Kevin, 2021/03/18
- Re: [RFC PATCH 0/3] vfio/migration: Support manual clear vfio dirty log, Kunkun Jiang, 2021/03/18
- RE: [RFC PATCH 0/3] vfio/migration: Support manual clear vfio dirty log, Tian, Kevin, 2021/03/18
- Re: [RFC PATCH 0/3] vfio/migration: Support manual clear vfio dirty log, Kunkun Jiang, 2021/03/18
- Re: [RFC PATCH 0/3] vfio/migration: Support manual clear vfio dirty log, Kunkun Jiang, 2021/03/22