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SubjectRe: [PATCH] iommu/amd: flush not present cache in iommu_map_page
On Wed, Apr 24, 2019 at 03:47:39PM +0100, Tom Murphy wrote:
> >And I'd really like to understand the unlikely - amd_iommu_np_cache
> >is set based on a hardware capability, so it seems rather odd to mark
> >it unlikely. Dynamic branch prediction really should do the right thing
> >here usually.
>
> Here is the commit which added it without any explanation:
> https://github.com/torvalds/linux/commit/270cab2426cdc6307725e4f1f46ecf8ab8e69193
>
> should we remove it seen as there's no explanation given ?

I'd be tempted to do that. But lets just ask Joerg if he has
any opinion..

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