On Tue, 2015-11-24 at 14:15 -0800, Shaohua Li wrote: > > I'm reluctant to change that. If it hurts you, kick your system > > vendor until they stop doing stupid things with RMRRs. > > Hmm, yes, it's a device with RMRR. Don't think we can ask vendor to > stop it though.
Get a new vendor? > I'd really like an option to avoid the penality for RMRR devices. RMRR devices should just die. It's insanely stupid in almost all cases. > Would a new option like 'iommu=strictpt' work? Which does what? Forces passthrough in *all* cases, even when it then has to use SWIOTLB? I would much prefer to just accept that RMRR-afflicted devices are crippled. -- dwmw2
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