allow drivers to flush in-flight DMA v2
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b4 am [email protected]Versions newest first
- v1 Latest4 patches 8 repliesIn review
Patches in v1 No applies recorded yet
| # | Subject and files | Size | Replies | Applied |
|---|---|---|---|---|
| 1/4 | dma: add dma_flags_set_dmabarrier() to dma interfaceinclude/ | +6 | 1 reply | |
| 2/4 | dma: redefine dma_flags_set_dmabarrier() for sn-ia64arch/ include/ | +50 | 1 reply | |
| 3/4 | dma: document dma_flags_set_dmabarrier()Documentation/ | +26 | 1 reply | |
| 4/4 | mthca: allow setting "dmabarrier" on user-allocated memorydrivers/ drivers/ drivers/ +10 more | +32 | 2 replies |
Reviews trailers per patch
1 of 4 patches has a Reviewed-by or Acked-by.
| Patch | Grant Grundler |
|---|---|
| 1/4 | |
| 2/4 | |
| 3/4 | A-b |
| 4/4 |
Trailers given in replies are filled; those carried in the patches from earlier versions are outlined with dashes.
Cover letter [PATCH 0/4] allow drivers to flush in-flight DMA v2
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 4 patches in this patchset:
[1/4] dma: add dma_flags_set_dmabarrier() to dma interface [2/4] dma: redefine dma_flags_set_dmabarrier() for sn-ia64 [3/4] dma: document dma_flags_set_dmabarrier()
[4/4] mthca: allow setting "dmabarrier" on user-allocated memory
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