allow drivers to flush in-flight DMA v3
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- v1 Latest5 patches 7 repliesIn review
Patches in v1 No applies recorded yet
| # | Subject and files | Size | Replies | Applied |
|---|---|---|---|---|
| 1/5 | dma: add dma_flags_set_attr() to dma interfaceinclude/ | +8 | 1 reply | |
| 2/5 | dma: redefine dma_flags_set_attr() for sn-ia64arch/ include/ | +50 | 1 reply | |
| 3/5 | dma: document dma_flags_set_attr()Documentation/ | +27 | 1 reply | |
| 4/5 | infiniband: add "dmabarrier" argument to ib_umem_get()drivers/ drivers/ drivers/ +9 more | +19 | 2 replies | |
| 5/5 | mthca: allow setting "dmabarrier" on user-allocated memorydrivers/ drivers/ | +15 | 2 replies |
Reviews trailers per patch
4 of 5 patches have a Reviewed-by or Acked-by.
| Patch | David S. Miller |
|---|---|
| 1/5 | A-b |
| 2/5 | A-b |
| 3/5 | A-b |
| 4/5 | A-b |
| 5/5 |
Trailers given in replies are filled; those carried in the patches from earlier versions are outlined with dashes.
Cover letter [PATCH 0/5] allow drivers to flush in-flight DMA v3
On Altix, DMA may be reordered between a device and host memory. This reordering can happen in the NUMA interconnect, and it usually results in correct operation and improved performance. In some situations it may be necessary to explicitly synchronize DMA from the device.
This patchset allows a memory region to be mapped with a "dmabarrier". Writes to the memory region will cause in-flight DMA to be flushed, providing a mechanism to order DMA from a device.
There are 5 patches in this patchset:
[1/5] dma: add dma_flags_set_attr() to dma interface [2/5] dma: redefine dma_flags_set_attr() for sn-ia64 [3/5] dma: document dma_flags_set_attr()
[4/5] infiniband: add "dmabarrier" argument to ib_umem_get() [5/5] mthca: allow setting "dmabarrier" on user-allocated memory
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