Messages in this thread | | | Date | Fri, 26 Aug 2022 18:28:39 +0800 | Subject | Re: [PATCH v2] iommu/iova: Optimize alloc_iova with rbtree_augmented | From | Peng Zhang <> |
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> Though only 3-4 drivers use alloc_iova() directly, in my understanding > > your test has simulated the worst case, rcache doesn't work at all, > > "alloc_iova" +“remove_iova” number looks great for worst case.
There is another case, when the size to allocate greater to 2^5, even if alloc_iova_fast() is used, alloc_iova() will always be called because the maximum iova size that rcache supports to allocate is 32. IOVA_RANGE_CACHE_MAX_SIZE specifies the maximum size.
Thanks,
Peng
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