On Wed, 30 Sep 2020 13:14:23 +0530, vji...@codeaurora.org wrote:
> When ever a new iova alloc request comes iova is always searched
> from the cached node and the nodes which are previous to cached
> node. So, even if there is free iova space available in the nodes
> which are next to the cached node iova allocation can still fail
> because of this approach.
>
> Consider the following sequence of iova alloc and frees on
> 1GB of iova space
>
> [...]
Applied to arm64 (for-next/iommu/iova), thanks!
[1/2] iommu/iova: Retry from last rb tree node if iova search fails
https://git.kernel.org/arm64/c/4e89dce72521
[2/2] iommu/iova: Free global iova rcache on iova alloc failure
https://git.kernel.org/arm64/c/6fa3525b455a
Cheers,
--
Will
https://fixes.arm64.dev
https://next.arm64.dev
https://will.arm64.dev
