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SubjectDMA-API: cacheline tracking ENOMEM, dma-debug disabled due to nouveau ?
Hello

Since lot of release (at least since 4.19), I hit the following error message:
DMA-API: cacheline tracking ENOMEM, dma-debug disabled

After hitting that, I try to check who is creating so many DMA mapping and see:
cat /sys/kernel/debug/dma-api/dump | cut -d' ' -f2 | sort | uniq -c
6 ahci
257 e1000e
6 ehci-pci
5891 nouveau
24 uhci_hcd

Does nouveau having this high number of DMA mapping is normal ?

Regards

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