Messages in this thread | | | From | Linus Torvalds <> | Date | Sat, 26 Mar 2022 15:41:40 -0700 | Subject | Re: [REGRESSION] Recent swiotlb DMA_FROM_DEVICE fixes break ath9k-based AP |
| |
On Sat, Mar 26, 2022 at 3:38 PM David Laight <David.Laight@aculab.com> wrote: > > Is the idea of 'buffer ownership' even a good one?
I do think it might be best to not think in those terms, but literally just in data movement terms.
Because the "buffer ownership" mental model is clearly confused, when data transfer might be ongoing, but the CPU might need to just look at "what's going on right now" without actually taking any ownership of the buffer.
Linus
| |