Opened 12 years ago
Last modified 6 years ago
#421 new defect
Non-anomymous DMA allocation needs to trigger on-demand mapping
| Reported by: | Martin Decky | Owned by: | Martin Decky |
|---|---|---|---|
| Priority: | major | Milestone: | |
| Component: | helenos/kernel/generic | Version: | mainline |
| Keywords: | Cc: | ||
| Blocker for: | Depends on: | ||
| See also: |
Description
The current mainline implementation of non-anonymous DMA mapping is very rudimentary. The current code basically only looks up a physical translation of the given virtual address
As the kernel uses on-demand mapping, if the uspace supplies a memory address to SYS_DMAMEM_MAP which has not been touched yet after its mapping into the address space, the translation fails (as the on-demand page mapping has not been established yet).
The implementation would basically need to trigger the on-demand mapping.
Change History (3)
comment:1 by , 12 years ago
| Milestone: | 0.5.0 → 0.5.1 |
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comment:2 by , 10 years ago
| Milestone: | 0.6.0 → 0.7.1 |
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comment:3 by , 6 years ago
| Milestone: | 0.7.1 |
|---|
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