Messages in this thread | | | Date | Wed, 14 Aug 2019 19:49:27 +0200 | From | Daniel Vetter <> | Subject | Re: DMA-API: cacheline tracking ENOMEM, dma-debug disabled due to nouveau ? |
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On Wed, Aug 14, 2019 at 04:50:33PM +0200, Corentin Labbe wrote: > 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 ?
Yeah seems perfectly fine for a gpu. -Daniel -- Daniel Vetter Software Engineer, Intel Corporation http://blog.ffwll.ch
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