diff options
Diffstat (limited to 'lib/Kconfig.debug')
| -rw-r--r-- | lib/Kconfig.debug | 12 |
1 files changed, 10 insertions, 2 deletions
diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug index 6982094a7e74..900b63c1e899 100644 --- a/lib/Kconfig.debug +++ b/lib/Kconfig.debug @@ -1584,8 +1584,16 @@ config DMA_API_DEBUG With this option you will be able to detect common bugs in device drivers like double-freeing of DMA mappings or freeing mappings that were never allocated. - This option causes a performance degredation. Use only if you want - to debug device drivers. If unsure, say N. + + This also attempts to catch cases where a page owned by DMA is + accessed by the cpu in a way that could cause data corruption. For + example, this enables cow_user_page() to check that the source page is + not undergoing DMA. + + This option causes a performance degradation. Use only if you want to + debug device drivers and dma interactions. + + If unsure, say N. source "samples/Kconfig" |