Re: [RFC PATCH net-next] net: mana: Force single RX buffer per page under SWIOTLB bounce modes

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In reply to: Dipayaan Roy: "[RFC PATCH net-next] net: mana: Force single RX buffer per page under SWIOTLB bounce modes"
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From: Jakub Kicinski

Date: Mon Apr 27 2026 - 18:45:03 EST

On Mon, 27 Apr 2026 07:41:11 -0700 Dipayaan Roy wrote:
> In both cases, sub-page RX buffer fragments allocated via page_pool may
> not be compatible with bounce buffering in this mode, leading to failures
> in the RX path.

What does it mean to not be compatible with swiotlb?
Normally that indicates that DMA API is mis-used.