Difference between revisions of "Checklist"

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*IOMMU to prevent DMA ghosting
 
*IOMMU to prevent DMA ghosting
 +
<pre>
 +
To clarify, do you mean CONFIG_INTEL_IOMMU and
 +
CONFIG_INTEL_IOMMU_DEFAULT_ON? It would appear the former is generally
 +
configured on the average distribution, but not the latter, requiring an
 +
explicit kernel parameter to be supplied at boot in order to enable it.
 +
 +
> not clear to me that Linux distributions ship with this enabled,
 +
> although that is a concern for ZFSOnLinux and various Linux
 +
> distributions. I will patch Gentoo's genkernel software to add support
 +
> for this functionality by default.
 +
 +
So you are going to enable CONFIG_INTEL_IOMMU_DEFAULT_ON in the default
 +
Gentoo kernel config from now on? There was a mention of a similar feature
 +
in FreeBSD, I'm not sure if it changed since this posting discussing it:
 +
 +
</pre>
 
*FF and Chrome LTS/Business
 
*FF and Chrome LTS/Business

Latest revision as of 16:37, 12 November 2013

  • IOMMU to prevent DMA ghosting
To clarify, do you mean CONFIG_INTEL_IOMMU and
CONFIG_INTEL_IOMMU_DEFAULT_ON? It would appear the former is generally
configured on the average distribution, but not the latter, requiring an
explicit kernel parameter to be supplied at boot in order to enable it.

> not clear to me that Linux distributions ship with this enabled,
> although that is a concern for ZFSOnLinux and various Linux
> distributions. I will patch Gentoo's genkernel software to add support
> for this functionality by default.

So you are going to enable CONFIG_INTEL_IOMMU_DEFAULT_ON in the default
Gentoo kernel config from now on? There was a mention of a similar feature
in FreeBSD, I'm not sure if it changed since this posting discussing it:

  • FF and Chrome LTS/Business