On Fri, Jan 17, 2025 at 09:16:52PM +0000, David Howells wrote: > Hi, > > I'd like to propose a discussion of two things: firstly, how might we improve > iov_iter and, secondly, would it be possible to replace scatterlists. <...> > Rumour has it that John Hubbard may be working along similar lines, possibly > just in the area of bio_vecs and ITER_BVEC. > > > [*] Second: Can we replace the uses of scatterlist with iov_iter and reduce > the number of iterator classes we have? <...> I would say yes to the questions. Regarding rumors, I don't know, but Christoph, Jason and I are working towards this goal. We proposed new DMA API which doesn't need scatterlists and allows callers to implement their own data-structures. See this "[PATCH v6 00/17] Provide a new two step DMA mapping API" series https://lore.kernel.org/all/cover.1737106761.git.leon@xxxxxxxxxx and its block layer followup "[RFC PATCH 0/7] Block and NMMe PCI use of new DMA mapping API" https://lore.kernel.org/all/cover.1730037261.git.leon@xxxxxxxxxx Thanks
