Re: [PATCH 10/10] dmapool: improve scalability of dma_pool_free

[Keith Busch]

On Tue, May 31, 2022 at 02:23:44PM -0400, Tony Battersby wrote:
> dma_pool_free() scales poorly when the pool contains many pages because
> pool_find_page() does a linear scan of all allocated pages.  Improve its
> scalability by replacing the linear scan with a red-black tree lookup.
> In big O notation, this improves the algorithm from O(n^2) to O(n * log n).

The improvement should say O(n) to O(log n), right?