Messages in this thread | | | Date | Sat, 27 Sep 2008 20:18:55 +0200 | From | Ingo Molnar <> | Subject | Re: [PATCH 3/3] x86/iommu: use __GFP_ZERO instead of memset for GART |
| |
another thing:
How hard would it be to add an CONFIG_IOMMU_DEBUG option that forces as many DMA requests to go via the IOMMU as possible?
This slows things down of course so it's only for debugging - but it also makes sure that we utilize the IOMMU code to the maximum - which is not normally the case.
Would be nice to have it .config driven (default-disabled), so that -tip's randconfig testing can stumble upon it every now and then. I've got GART test-systems - this way we could find certain types of IOMMU breakages sooner.
Ingo
| |